Advanced Panel Controllers

HI700221-1 Conductivity Digital Controller with Four-ring Potentiometric Probe, Analog Output, 115V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for conductivity

Order Information:

HI 700 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 700221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 700221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 700222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 700222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI700221-2 Conductivity Digital Controller with Four-ring Potentiometric Probe, Analog Output, 230V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for conductivity

Order Information:

HI 700 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 700221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 700221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 700222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 700222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI700222-1 Conductivity Digital Controller with Four-ring Potentiometric Probe, RS485 Output, 115V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for conductivity

Order Information:

HI 700 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 700221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 700221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 700222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 700222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI700222-2 Conductivity Digital Controller with Four-ring Potentiometric Probe, RS485 Output, 230V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for conductivity

Order Information:

HI 700 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 700221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 700221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 700222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 700222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI504112-1 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 115V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504112-2 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 230V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504214-1 pH/ORP Digital Controller with Sensor Check™, Dual Analog Output, 115V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504222-1 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 115V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504222-2 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 230V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504224-0 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 24VDC/AC by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504924-1 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 115V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504924-2 pH/ORP Digital Controller with Sensor Check™, Single Analog Output, 230V by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI720122-1 Conductivity Process Digital Controller with Inductive Probe, Single Analog Output, 115V by Hanna Instruments

HI 720 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points and includes an inductive conductivity probe.

The measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.

Temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation, reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.

The working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH/ORP or controlling (only for models with PID), and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.

The controller logging feature can save the last 100 error, configuration, calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.

The controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.

• Autoranging EC or TDS and temperature for EC/TDS
• Automatic temperature compensation for EC/TDS
• Fully customizable: automatic/manual/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%/C; Selectable temperature compensation curve between linear, salinity or user definable, Selectable TDS factor between 0.01 to 1.00
• Temperature compensation curve selectable between linear, salinity or user defined
• TDS factor selectable between 0.01 to 1.00
• Supports inductive EC probe with built-in or external Pt100/1000 sensor temperature
• PID, PI, Proportional or On/off control for one or two set points
• Sensor Check™ for real time detection of soiled EC/TDS probes
• Damage test for temperature probe
• Mount probes directly or use a digital transmitter for large distances
• Logging of up to 100 system events
• Control with up to 4 relays or analog output in 0-20 mA or 4-20 mA
• Probe cleaning program performed automatically, by alarm or upon user request
• Large variety of models to fit the user system requirements

In-Line Cleaning

The cleaning feature allows an automatic cleaning action of the probe. To perform cleaning, the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:

1. Simple cleaning: with water only, it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.
2. Advanced cleaning (optional): with water and detergent, it can be triggered by the following events:

• Timer; Digital input or RS485 command (external trigger);
• Timer and digital input or RS485 command (external trigger);
• Timer masked by the digital input (i.e. disabled when the digital input is on);
• Error for which a cleaning action can be configured

EC Inductive Probe Theory of Operation

This instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.

The instrument supplies a high frequency, reference voltage to the “Drive Coil”, and a strong magnetic field is generated in the toroid.

The liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding, the current induced in the flow is proportional to this voltage, and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.

The conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.

The liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid, and the induced current can be measured as an output.

The output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.

For an inductive cell, the cell constant is defined as the measured conductivity, obtained by making a loop through the sensor with a resistor R, multiplied by that R value.

The cell constant depends only on the sensor geometry. However, when the probe is immersed in a liquid, the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.

Otherwise, it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)/(measured resistance). The installation factor is < 1 for conductive piping/containers, and > 1 for nonconductive piping/containers.

Since this type of sensor has no electrodes, common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.

Order Information:

Each HI 720 model is supplied complete with mounting brackets and instructions.

Choose your configuration
HI 720122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 720122-2 single setpoint, on/off and PID control, single analog output, 230V
HI 720224-1 dual setpoint, on/off and PID control, dual analog output, 115V
HI 720224-2 dual setpoint, on/off and PID control, dual analog output, 230V

HI720122-2 Conductivity Process Digital Controller with Inductive Probe, Single Analog Output, 230V by Hanna Instruments

HI 720 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points and includes an inductive conductivity probe.

The measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.

Temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation, reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.

The working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH/ORP or controlling (only for models with PID), and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.

The controller logging feature can save the last 100 error, configuration, calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.

The controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.

• Autoranging EC or TDS and temperature for EC/TDS
• Automatic temperature compensation for EC/TDS
• Fully customizable: automatic/manual/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%/C; Selectable temperature compensation curve between linear, salinity or user definable, Selectable TDS factor between 0.01 to 1.00
• Temperature compensation curve selectable between linear, salinity or user defined
• TDS factor selectable between 0.01 to 1.00
• Supports inductive EC probe with built-in or external Pt100/1000 sensor temperature
• PID, PI, Proportional or On/off control for one or two set points
• Sensor Check™ for real time detection of soiled EC/TDS probes
• Damage test for temperature probe
• Mount probes directly or use a digital transmitter for large distances
• Logging of up to 100 system events
• Control with up to 4 relays or analog output in 0-20 mA or 4-20 mA
• Probe cleaning program performed automatically, by alarm or upon user request
• Large variety of models to fit the user system requirements

In-Line Cleaning

The cleaning feature allows an automatic cleaning action of the probe. To perform cleaning, the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:

1. Simple cleaning: with water only, it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.
2. Advanced cleaning (optional): with water and detergent, it can be triggered by the following events:

• Timer; Digital input or RS485 command (external trigger);
• Timer and digital input or RS485 command (external trigger);
• Timer masked by the digital input (i.e. disabled when the digital input is on);
• Error for which a cleaning action can be configured

EC Inductive Probe Theory of Operation

This instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.

The instrument supplies a high frequency, reference voltage to the “Drive Coil”, and a strong magnetic field is generated in the toroid.

The liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding, the current induced in the flow is proportional to this voltage, and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.

The conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.

The liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid, and the induced current can be measured as an output.

The output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.

For an inductive cell, the cell constant is defined as the measured conductivity, obtained by making a loop through the sensor with a resistor R, multiplied by that R value.

The cell constant depends only on the sensor geometry. However, when the probe is immersed in a liquid, the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.

Otherwise, it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)/(measured resistance). The installation factor is < 1 for conductive piping/containers, and > 1 for nonconductive piping/containers.

Since this type of sensor has no electrodes, common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.

Order Information:

Each HI 720 model is supplied complete with mounting brackets and instructions.

Choose your configuration
HI 720122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 720122-2 single setpoint, on/off and PID control, single analog output, 230V
HI 720224-1 dual setpoint, on/off and PID control, dual analog output, 115V
HI 720224-2 dual setpoint, on/off and PID control, dual analog output, 230V

HI720224-1 Conductivity Process Digital Controller with Inductive Probe, Dual Analog Output, 115V by Hanna Instruments

HI 720 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points and includes an inductive conductivity probe.

The measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.

Temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation, reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.

The working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH/ORP or controlling (only for models with PID), and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.

The controller logging feature can save the last 100 error, configuration, calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.

The controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.

• Autoranging EC or TDS and temperature for EC/TDS
• Automatic temperature compensation for EC/TDS
• Fully customizable: automatic/manual/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%/C; Selectable temperature compensation curve between linear, salinity or user definable, Selectable TDS factor between 0.01 to 1.00
• Temperature compensation curve selectable between linear, salinity or user defined
• TDS factor selectable between 0.01 to 1.00
• Supports inductive EC probe with built-in or external Pt100/1000 sensor temperature
• PID, PI, Proportional or On/off control for one or two set points
• Sensor Check™ for real time detection of soiled EC/TDS probes
• Damage test for temperature probe
• Mount probes directly or use a digital transmitter for large distances
• Logging of up to 100 system events
• Control with up to 4 relays or analog output in 0-20 mA or 4-20 mA
• Probe cleaning program performed automatically, by alarm or upon user request
• Large variety of models to fit the user system requirements

In-Line Cleaning

The cleaning feature allows an automatic cleaning action of the probe. To perform cleaning, the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:

1. Simple cleaning: with water only, it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.
2. Advanced cleaning (optional): with water and detergent, it can be triggered by the following events:

• Timer; Digital input or RS485 command (external trigger);
• Timer and digital input or RS485 command (external trigger);
• Timer masked by the digital input (i.e. disabled when the digital input is on);
• Error for which a cleaning action can be configured

EC Inductive Probe Theory of Operation

This instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.

The instrument supplies a high frequency, reference voltage to the “Drive Coil”, and a strong magnetic field is generated in the toroid.

The liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding, the current induced in the flow is proportional to this voltage, and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.

The conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.

The liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid, and the induced current can be measured as an output.

The output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.

For an inductive cell, the cell constant is defined as the measured conductivity, obtained by making a loop through the sensor with a resistor R, multiplied by that R value.

The cell constant depends only on the sensor geometry. However, when the probe is immersed in a liquid, the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.

Otherwise, it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)/(measured resistance). The installation factor is < 1 for conductive piping/containers, and > 1 for nonconductive piping/containers.

Since this type of sensor has no electrodes, common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.

Order Information:

Each HI 720 model is supplied complete with mounting brackets and instructions.

Choose your configuration
HI 720122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 720122-2 single setpoint, on/off and PID control, single analog output, 230V
HI 720224-1 dual setpoint, on/off and PID control, dual analog output, 115V
HI 720224-2 dual setpoint, on/off and PID control, dual analog output, 230V

HI720224-2 Conductivity Process Digital Controller with Inductive Probe, Dual Analog Output, 230V by Hanna Instruments

HI 720 is a PID, PI, proportional or on/off EC/TDS controller with one or two set points and includes an inductive conductivity probe.

The measurement configuration settings and EC and TDS control are saved separately and permits users to switch between EC and TDS without losing settings. TDS or a specific user defined curve can be used for concentration.

Temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with ATC of conductivity. Conductivity temperature compensation parameters are fully customizable: linear or non-linear temperature compensation, reference temperature and temperature coefficient. Users can define the specific curve of temperature compensation.

The working conductivity range is user selectable and the conductivity calibration in one point is performed in a value that corresponds to the measurement range.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for recording of pH/ORP or controlling (only for models with PID), and up to 4 relays can be used to control the process or be connected with alarm status. Controller status is visable with LED's on the front panel and on LCD.

The controller logging feature can save the last 100 error, configuration, calibration and cleaning events. This information can be accessible from a PC through RS485 and HI 92500 software.

The controller also has a full auto diagnostic procedure. A cleaning procedure of the EC inductive probe is also available.

• Autoranging EC or TDS and temperature for EC/TDS
• Automatic temperature compensation for EC/TDS
• Fully customizable: automatic/manual/no temperature compensation; Selectable reference temperature between 02 and 25 C; Selectable temperature coefficient between 0.00 to 20.00%/C; Selectable temperature compensation curve between linear, salinity or user definable, Selectable TDS factor between 0.01 to 1.00
• Temperature compensation curve selectable between linear, salinity or user defined
• TDS factor selectable between 0.01 to 1.00
• Supports inductive EC probe with built-in or external Pt100/1000 sensor temperature
• PID, PI, Proportional or On/off control for one or two set points
• Sensor Check™ for real time detection of soiled EC/TDS probes
• Damage test for temperature probe
• Mount probes directly or use a digital transmitter for large distances
• Logging of up to 100 system events
• Control with up to 4 relays or analog output in 0-20 mA or 4-20 mA
• Probe cleaning program performed automatically, by alarm or upon user request
• Large variety of models to fit the user system requirements

In-Line Cleaning

The cleaning feature allows an automatic cleaning action of the probe. To perform cleaning, the controller activates an external device (pump). Cleaning actions never take place if no relay is configured for cleaning. Cleaning can be of two types:

1. Simple cleaning: with water only, it can be triggered only by a timer (periodical cleaning) or by an error for which a cleaning action can be configured.
2. Advanced cleaning (optional): with water and detergent, it can be triggered by the following events:

• Timer; Digital input or RS485 command (external trigger);
• Timer and digital input or RS485 command (external trigger);
• Timer masked by the digital input (i.e. disabled when the digital input is on);
• Error for which a cleaning action can be configured

EC Inductive Probe Theory of Operation

This instrument allows conductivity measurements without any electrical contact between electrodes and process fluid. The measurement is based on inductive coupling of two toroidal transformers by the liquid.

The instrument supplies a high frequency, reference voltage to the “Drive Coil”, and a strong magnetic field is generated in the toroid.

The liquid passes through the hole in the toroid and can be considered as one turn secondary winding. The magnetic field induces a voltage in this liquid winding, the current induced in the flow is proportional to this voltage, and the conductance of the liquid one-turn winding is in accordance to Ohm’s law.

The conductance is proportional to the specific conductivity and a constant factor determined by the sensor geometry and installation.

The liquid also passes through the second toroid and therefore the liquid turn can be considered as a primary winding of the second toroidal transformer. The current in the liquid will create a magnetic field in the second toroid, and the induced current can be measured as an output.

The output current of this “receive coil” is therefore proportional to the specific conductivity of process liquid.

For an inductive cell, the cell constant is defined as the measured conductivity, obtained by making a loop through the sensor with a resistor R, multiplied by that R value.

The cell constant depends only on the sensor geometry. However, when the probe is immersed in a liquid, the induced current in the solution is affected by the piping or any other container where the probe is inserted. This effect is negligible when there is an area of at least 3 cm of liquid around the cell.

Otherwise, it is necessary to multiply measurements by the installation factor: Conductivity = (cell constant)(installation factor)/(measured resistance). The installation factor is < 1 for conductive piping/containers, and > 1 for nonconductive piping/containers.

Since this type of sensor has no electrodes, common problems such as polarization and contamination are eliminated and will not affect the performance of the electrodeless sensor.

Order Information:

Each HI 720 model is supplied complete with mounting brackets and instructions.

Choose your configuration
HI 720122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 720122-2 single setpoint, on/off and PID control, single analog output, 230V
HI 720224-1 dual setpoint, on/off and PID control, dual analog output, 115V
HI 720224-2 dual setpoint, on/off and PID control, dual analog output, 230V

PH502421-1 pH Digital Controller with Matching Pin and PID Control, 115V by Hanna Instruments

The pH 502 series of controllers offer many features to increase the level of control available in your plant. These instruments can be configured to utilize P, PI, PID controlling. With this feature, the pH 502 takes the place of three instruments that only allow one configuration each. The pH 502 line includes models that incorporate control through analog output to drive any compatible device, such as an electrovalve or pump. Models equipped with a solid state relay are also available to ensure maximum life of the switching device. Each model has a differential input for a grounding bar to extend electrode life. Several models come with an RS485 port, as well as analog recorder output.

Fail Safe Alarm System protects against power interruption or line failure. 1, 2 or 3 point automatic calibration and manual or Automatic Temperature Compensation complete the features of this controller.

• Single or dual set point
• SSR relay available
• Control through analog output
• PID control
• Fully programmable
• mA and VDC recorder output or RS485
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 502421-1 dual setpoint with SSR relay, on/off and PID controls, analog output, 115V
pH 502421-2 dual setpoint with SSR relay, on/off and PID controls, analog output, 230V and PID controls, RS485 output, 230V

Order Information:

Each pH 502 model is supplied complete with mounting brackets and instructions.

PH502421-2 pH Digital Controller with Matching Pin and PID Control, 230V by Hanna Instruments

The pH 502 series of controllers offer many features to increase the level of control available in your plant. These instruments can be configured to utilize P, PI, PID controlling. With this feature, the pH 502 takes the place of three instruments that only allow one configuration each. The pH 502 line includes models that incorporate control through analog output to drive any compatible device, such as an electrovalve or pump. Models equipped with a solid state relay are also available to ensure maximum life of the switching device. Each model has a differential input for a grounding bar to extend electrode life. Several models come with an RS485 port, as well as analog recorder output.

Fail Safe Alarm System protects against power interruption or line failure. 1, 2 or 3 point automatic calibration and manual or Automatic Temperature Compensation complete the features of this controller.

• Single or dual set point
• SSR relay available
• Control through analog output
• PID control
• Fully programmable
• mA and VDC recorder output or RS485
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 502421-1 dual setpoint with SSR relay, on/off and PID controls, analog output, 115V
pH 502421-2 dual setpoint with SSR relay, on/off and PID controls, analog output, 230V and PID controls, RS485 output, 230V

Order Information:

Each pH 502 model is supplied complete with mounting brackets and instructions.

PH500111-1 pH Digital Controller with Matching Pin, Analog Output, 115V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500111-2 pH Digital Controller with Matching Pin, Analog Output, 230V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500121-1 pH Digital Controller with Matching Pin, Analog Output, 115V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500121-2 pH Digital Controller with Matching Pin, Analog Output, 230V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500211-1 pH Digital Controller with Matching Pin, Analog Output, 115V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500211-2 pH Digital Controller with Matching Pin, Analog Output, 230V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500221-1 pH Digital Controller with Matching Pin, Analog Output, 115V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500221-2 pH Digital Controller with Matching Pin, Analog Output, 230V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500222-1 pH Digital Controller with Matching Pin, Analog Output, 115V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

PH500222-2 pH Digital Controller with Matching Pin, Analog Output, 230V by Hanna Instruments

pH 500 series of controllers are simple to operate, microprocessor-based process meters packed with features. For more flexibility and better resolution for chart recorders, any two points between 0 and 14 pH can be chosen to correspond to the analog output spans. Several pH 500 models are equipped with a bi-directional RS232 port. Push button password programming prevents tampering.

The Fail Safe Alarm System protects the pH 500 against the pitfalls of process control, like power interruption or line failure. With pH 500 quick one, two or three point calibration at pH 4.01, 7.01 and 10.01 comes standard. The temperature can be manually or automatically compensated for. Models with RS232 output allow computer compatibility, a necessity for process control instrumentation. You can also choose from ON/OFF or proportional dosage to save on chemicals.

• Single or dual set point
• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic three point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Choose your configuration

pH 500111-1 single setpoint, on/off control, analog output, 115V
pH 500111-2 single setpoint, on/off control, analog output, 230V
pH 500112-1 single setpoint, on/off control, RS232 output, 115V
pH 500112-2 single setpoint, on/off control, RS232 output, 230V
pH 500121-1 single setpoint, proportional control, analog output, 115V
pH 500121-2 single setpoint, proportional control, analog output, 230V
pH 500211-1 dual setpoint, on/off control, analog output, 115V
pH 500211-2 dual setpoint, on/off control, analog output, 230V
pH 500212-1 dual setpoint, on/off control, RS232 output, 115V
pH 500212-2 dual setpoint, on/off control, RS232 output, 230V
pH 500221-1 dual setpoint, proportional control, analog output, 115V
pH 500221-2 dual setpoint, proportional control, analog output, 230V
pH 500222-1 dual setpoint, proportional control, RS232 output, 115V
pH 500222-2 dual setpoint, proportional control, RS232 output, 230V

Order Information:

Each pH 500 model is supplied complete with mounting brackets and instructions.

MV600111-1 ORP Digital Controller with Matching Pin, 115V by Hanna Instruments

The mV 600 controllers have been engineered with the same outstanding features as the pH 500 meters. The Fail Safe Alarm System protects these meters against the pitfalls of process control. User selectable timing capability safeguards against overdosing.

These instruments have a differential input, extending electrode life by eliminating ground loop current through the reference. Users can choose between ON/OFF and proportional control as well as selectable current and voltage output. For more flexibility and better resolution for chart recorders, choose any two points between 0 and 2000 mV to correspond to the analog output spans.

RS232 capability makes two mV 600 models PC compatible. Wiring the controllers is simple with extractable terminal modules. A host of self-testing features and user friendly functions make mV 600 a great value.

• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic two point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Order Information:

Each mV 600 model is supplied complete with mounting brackets and instructions.

Choose your configuration
mV 600111-1 single setpoint, on/off control, analog output, 115V
mV 600111-2 single setpoint, on/off control, analog output, 230V

MV600111-2 ORP Digital Controller with Matching Pin, 230V by Hanna Instruments

The mV 600 controllers have been engineered with the same outstanding features as the pH 500 meters. The Fail Safe Alarm System protects these meters against the pitfalls of process control. User selectable timing capability safeguards against overdosing.

These instruments have a differential input, extending electrode life by eliminating ground loop current through the reference. Users can choose between ON/OFF and proportional control as well as selectable current and voltage output. For more flexibility and better resolution for chart recorders, choose any two points between 0 and 2000 mV to correspond to the analog output spans.

RS232 capability makes two mV 600 models PC compatible. Wiring the controllers is simple with extractable terminal modules. A host of self-testing features and user friendly functions make mV 600 a great value.

• Fully programmable
• mA and VDC recorder output or RS232
• Differential input for ground loop protection
• Automatic two point calibration
• Last calibration data
• Automatic Temperature Compensation
• Simple wiring with removable terminal modules

Order Information:

Each mV 600 model is supplied complete with mounting brackets and instructions.

Choose your configuration
mV 600111-1 single setpoint, on/off control, analog output, 115V
mV 600111-2 single setpoint, on/off control, analog output, 230V

HI710221-1 Conductivity and TDS Digital Controller with Four-ring Potentiometric Probe, Analog Output, 115V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for both conductivity and TDS

Order Information:

HI 710 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 710221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 710221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 710222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 710222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI710221-2 Conductivity and TDS Digital Controller with Four-ring Potentiometric Probe, Analog Output, 230V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for both conductivity and TDS

Order Information:

HI 710 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 710221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 710221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 710222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 710222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI710222-1 Conductivity and TDS Digital Controller with Four-ring Potentiometric Probe, RS485 Output, 115V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for both conductivity and TDS

Order Information:

HI 710 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 710221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 710221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 710222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 710222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI710222-2 Conductivity and TDS Digital Controller with Four-ring Potentiometric Probe, RS485 Output, 230V by Hanna Instruments

The HI 700 series of regulators offer state of the art specifications for your process control. They can be configured for ON/OFF, proportional, PI or PID control. Thanks to our exclusive technology, they can be customized to best fit your application. Bright LED's show the current status even from a distance. A menu-driven display aids the user throughout the operations with running messages and clear prompts. All relevant parameters can be simply adjusted and will remain memorized until overwritten.

With self-diagnostic features and extractable terminals, installation and maintenance are fast and simple. Password protection guarantees that the calibration and predetermined parameters cannot be altered unnecessarily. The controllers can operate with four-ring probe or 4-20 mA signal. They accept probes with or without a built-in Pt100 temperature sensor.

• Fully programmable microprocessor memory
• Dual set points
• mA & VDC recorder output
• Differential input for ground loop protection
• Automatic one or two point calibration
• Last calibration data
• Manual or Automatic Temperature Compensation
• Extensive range for both conductivity and TDS

Order Information:

HI 710 model is provided with dual set point, ON/OFF and PID controls and is supplied with mounting brackets and instructions.

Choose your configuration
HI 710221-1 dual setpoint, on/off and PID controls, analog output, 115V
HI 710221-2 dual setpoint, on/off and PID controls, analog output, 230V
HI 710222-1 dual setpoint, on/off and PID controls, RS485 output, 115V
HI 710222-2 dual setpoint, on/off and PID controls, RS485 output, 230V

HI504214-2 Hanna pH /ORP Controller, 2 SP, On/Off, 2 Analog Output (230 VAC) by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504224-1 pH /ORP Controller, 2 SP, On/Off, 2 Analog Output, (115 VAC), & PID by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.

HI504224-2 pH /ORP Controller, 2 SP, On/Off, 2 Analog Output, (230 VAC), & PID by Hanna Instruments

HI 504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check™ is also available for pH and ORP probes.

The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.

One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.

Controller status is visable with LED's on the front panel and on LCD.

The controllers logging feature can save up to 6000 samples pH/°C or ORP and last 100 error, configuration, calibration and cleaning events. This information can accessible from a PC through RS485 and HI 92500 software. The powerful HI 92500 software has graphing capabilities and can print graphs directly or can be saved as a bitmap. Data can be exported in common spreadsheet formats.

• PID, PI, proportional or ON/OFF control of pH or ORP for one or two set points
• Sensor Check™ for a real-time pH/ORP electrode status monitoring
• Digital transmitter or direct connection of the probe
• Matching PIN to eliminate the ground loop effect
• Automatic temperature compensation for pH
• Logging of up to 100 system events and up to 6000 readings (pH, ORP, T)
• Control performed with up to 4 relays or analog output in 0-20 or 4-20 mA
• Automatic probe cleaning from alarm or user request

Sensor Check™ pH/ORP

Sensor Check™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement. The internal circuit of the instrument executes two independent tests, one for the probe and one for the reference chamber, measuring the respective impedance values every 5 seconds. These tests last for a very short period to avoid electrolysis and polarization, which can be caused by a prolonged exposure to an electric current. The types of problems identified by Sensor Check™ are: pH electrode broken, reference electrode dirty, reference electrode or matching pin not immersed, clogged or dirty electrode junction, short-circuit between cables of pH and reference electrodes, signal problems from the cable or connector due to humid or dirty environments. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the problem with a specific error code.

Analog Output: Data Logging or PID Dosage Control

Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.

Logging of the Last 100 Events

With the HI 504 series, it is possible to recall the sequence of the last 100 occurred events at any time: errors, calibrations performed, set parameter changes and cleaning cycles. Every code shown on the display corresponds to a certain type of event, error, or operation.

Programmable Cleaning Cycles

Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these problems, the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles. The cleaning cycle is a simple wash with either water or detergent, programmed by setting the rinse time and the pause length. The advanced cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from a remote control or through the isolated digital input on the rear panel, which can be connected to an external switch.

The controllers can also automatically activate both cleaning modes whenever Sensor Check™ reveals a soiled probe. A delay time can be set before restarting the reading after a cleaning cycle has taken place; this allows the probe to adjust to new operating conditions.

Programmable Hold System

The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.

Fail Safe Alarm System

HANNA’s exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. The system acts both on a hardware and a software level. The alarm relay functions in a normally closed condition, and is tripped when there is a power failure if, for example, the power cable is accidentally cut. This function is very important in industrial plants where alarms are usually not activated if there is a power supply interruption, which can cause serious damage due to a loss of control of the process plant. At the software level, the Fail Safe function activates an alarm in case of abnormal circumstances, for example if the dosing contacts remain closed for an excessive period. The alarm condition is also indicated by a red LED, located directly on the front panel of the controller.

Choose your configuration

HI 504112-1 single setpoint, on/off control, single analog output, 115V
HI 504112-2 single setpoint, on/off control, single analog output, 230V
HI 504122-1 single setpoint, on/off and PID control, single analog output, 115V
HI 504214-1 dual setpoint, on/off control, dual analog output, 115V
HI 504222-1 dual setpoint, on/off and PID control, single analog output, 115V
HI 504222-2 dual setpoint, on/off and PID control, single analog output, 230V
HI 504224-0 dual setpoint, on/off and PID control, dual analog output, 24VDC/AC
HI 504924-1 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 115V
HI 504924-2 dual setpoint, advanced cleaning, on/off and PID control, dual analog output, 230V

Order Information:

Each HI 504 model is supplied complete with mounting brackets and instructions.