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RKI Instruments GD-K71D Smart Transmitter, Chlorine (Cl2), 0 - 1.5 ppm - GD-K71DS-CL2

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RKI Instruments
RKI Instruments GD-K71D Smart Transmitter, Chlorine (Cl2), 0 - 1.5 ppm - GD-K71DS-CL2
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RKI Instruments GD-K71D Smart Transmitter, Chlorine (Cl2), 0 - 1.5 ppm - GD-K71DS-CL2

RKI Instruments GD-K71D Smart Transmitter, Chlorine (Cl2), 0 - 1.5 ppm - GD-K71DS-CL2


GD-K71DS-CL2 GD-K71D Smart Transmitter, Chlorine (Cl2), 0 - 1.5 ppm by RKI Instruments

The GD-K71D is a complete sample drawing gas monitor, including digital readout and alarm relays. A new gas sensor technology using an intelligent sensor for remote location calibration and setup is used. The new GD-K71D sensors are designed to provide a longer time period between calibrations. Calibration intervals have been extended to12 months of on-line service which equates to reduced maintenance cost. In addition, the sensors can be calibrated away from the gas detector installation, for example in a service area or off site. This eliminates the inconvenience of having calibration gases in the fab or monitoring location. GD-K71D easily connects to an existing PLC system and is ideal for applications needing a local readout or where a relay control is needed. The automatic zero correction software provides excellent long term stability and minimizes false alarms due to zero drift.


  • LED digital display
  • Sensor information and calibration is stored within sensor memory
  • Several data transmission options available
  • Zero suppression and correction
  • Housing design for narrow wall mounting locations
  • Self-diagnostic functions by microprocessor
  • Electrochemical sensors for most semiconductor gases
  • Built-in sampling pump
  • Easy replacement of pump and sensor
  • Two alarm levels with relays, plus trouble alarm
  • 24VDC operation
  • Optional NEMA 4X housing available


  • Semiconductor
  • Chemical Processing
  • Laboratory
  • Manufacturing
  • HVAC

*Please note we can only ship RKI products to customers within the United States

GD-K71D Specifications:
Detection principle Electrochemical cell
Detection method Sample drawing type
Signal transmission Analog transmission (4-20 mA) digital transmission (optional DeviceNet)
Display Digital LED display of gas concentration, 4 digits
Gas alarms Two alarm levels: 1st alarm (Yellow LED), 2nd alarm (Red LED)
Dry outputs for remote alarms Dry contact relay for 1st, 2nd, and trouble alarms (Normally Open or Normally Closed)
Alarm Response Time Approximately 10 - 15 seconds when exposed to gas concentration of 1.6 times alarm level for most gases (Same as T60)
Self diagnosistic function Trouble, low flow, system failure, communication error, and zero correction
Operating conditions 0 - 40°C, 30 - 85% R. H.
Power requirements 24 VDC ± 10%, Approx. 10W
Applicable cable Shielded cable 3C, 1.25 sq (18 gauge)
Enclosure Wall mounting
Dimensions 2.8" (W) x 6.7" (H) x 6.0" (D), approximately 4.4 lbs
70 mm (W) x 170 mm (H) x 153 mm (D), approximately 2 kg

Partial List Of Detectable Gases
Ammonia (NH3) 0 - 75.0 ppm
Arsine (AsH3) 0 - 0.20 ppm
Chlorine (Cl2) 0 - 3.0 ppm
Chlorine Dioxide (ClO2 0 - 1.00 ppm
Chlorine Trifluoride (ClF3) 0 - 1.00 ppm
Diborane (B2H6) 0 - 0.30 ppm
Fluorine (F2) 0 - 3.0 ppm
Germane (GeH4) 0 - 0.60 ppm
Hydrogen Bromide (HBr) 0 - 9.00 ppm
Hydrogen Cyanide (HCN) 0 - 30.0 ppm
Hydrogen Chloride (HCl) 0 - 15.0 ppm
Hydrogen Fluoride (HF) 0 - 9.0 ppm
Hydrogen Sulfide (H2S) 0 - 30.0 ppm (optional 0-1.00 ppm)
Nitric Oxide (NO) 0 -100.0 ppm
Nitrogen Dioxide (NO2) 0 - 15.0 ppm
Ozone (O3) 0 - 0.60 ppm
Phosphine (PH3) 0 - 1.0 ppm
Silane (SiH4) 0 - 15.0 ppm
Sulfur Dioxide (SO2) 0 - 30.0 ppm

Datasheets & User Manuals

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