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GfG EC 28 Gas Transmitter with Sensor, Oxygen (O2), Display / Alarm - 2811-727-003

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GfG EC 28 Gas Transmitter with Sensor, Oxygen (O2), Display / Alarm - 2811-727-003

GfG EC 28 Gas Transmitter with Sensor, Oxygen (O2), Display / Alarm - 2811-727-003


2811-727-003 EC 28 Gas Transmitter with Sensor, Oxygen (O2), Display / Alarm by GfG

Advanced Technology

Wherever hazards are expected, the EC 28 transmitter and GfG’s proven monitoring systems are the right choice for reliable surveillance. The ATEX-certified design, an integrated, Ex-proof buzzer, and bright alarm LEDs provide the highest safety in hazardous areas by including visual and audible alarms. The gas alarm not only alerts the person in the control room of hazards, but also the person on-site.

Easy handling

Smart sensor technology allows a user to install the transmitter or to replace a sensor within a few seconds – just plug the sensor into the transmitter. Adjustments are done directly at the transmitter using touch keys or with the remote control (one-person calibration).

Remote Control RC2

Ammonia and hydrogen are lighter than air. With the transmitter installed close to the ceiling, GfG can provide permanently connected cables with plugs for the remote control, which allow the user to do all adjustments without having to climb a ladder. In addition, one remote control can be used for several transmitters, which helps cut costs and increase efficiency.

The remote control display is always identical to that of the transmitter, making inspection, service, and calibration considerably simple.

The remote control reads the current gas concentration and can be used as an external display.

Integrated Alarm – Saves Money on Ex-proof Alarm and Wiring!

The EC 28 D model shows the current gas concentration on-site at the display of the transmitter and also at GfG’s GMA controller.

The EC 28 DAprovides additional bright alarm LEDs and a buzzer – avoiding costs for a separate Ex-proof horn and an Ex-proof light. You also save money on wiring to connect the controller and alarm devices.

In combination with GfG's flexible control units, the EC 28 provides various possibilities for reliable and cost-effective gas monitoring.

Reliable Measurement, Increased Safety, Minimized Cost of Operation

Accurate sensors and integrated temperature compensation provide the highest measurement accuracy. Low maintenance requirements and the long sensor life reduce your cost of ownership.


  • Reading of gas concentration at transmitter display
  • Ex-proof visual and audible alarms
  • ATEX certificate II 1 G EEx ia IIC T4 / II 2 G EEx em [ib] IIC T4
  • One-person calibration at transmitter using touch keys or remote control
  • Plug-in smart sensor – sensor replacement without opening the casing


  • Concentration display at transmitter or at remote control
  • ATEX II 1 G EEx ia IIC T4 / II 2 G EEx dem [ib] IIC T4
  • Ex-proof visual and audible alarms
  • No need for expensive Ex-proof buzzer or wiring
  • Easy sensor replacement by means of plug-in smart sensors
  • Long sensor life
  • Low service requirement
  • Permanent status and function display at transmitter
  • Adjustments without opening the casing using touch keys or remote control; easy handling even for hardto-reach transmitter positions
EC 28 Specifications:
Detection principle Electrochemical
Ambient temperature -4 to +122ºF / -20 to +50ºC
Output signal 4 – 20 mA
Supply voltage 15 –30 V DC
Weight 28.22 ounces (800 grams) with display
Dimensions 7.63x3.94x2.17 inches (193x100x55 mm) (HxWxD)
Casing protection IP 64
ATEX Labelling II 1 G EEx ia IIC T4 and II 2 G EEx em [ib] IIC T4
Transmitter cable Shielded cable
2/3/6 x 0.75mm2
M 16 x 1.5
Display 4-digit LCD for linearized measurement values and messages, service, LEDs for operation / fault
Touch keys 3 keys for all adjustments/calibration, function test
Options Intrinsically safe (EC28 I, EC28 DI) 1 relay (EC28 DAR)

Gases and Ranges:
Gase Range
Ammonia (NH3) 0-200, 0-500, 0-1,000
Carbon monoxide (CO) 0-500, 0-2,000
Chlorine (Cl2) 0-50, 0-250
Chlorine dioxide (ClO2) 0-2
Hydrogen (H2) 0-2,000, 0-1% volume, 0-4% volume
Hydrogen chloride (HCl) 0-30, 0-200
Hydrogen cyanide (HCN) 0-50, 0-200
Ethylene oxide (C2H4O) 0-100
Hydrogen fluoride (HF) 0-10
Hydrogen sulfide (H2S) 0-200, 0-1,000
Nitrogen dioxide (NO2) 0-50, 0-200
Nitrogen monoxide (NO) 0-300, 0-1,500
Oxygen (02) 0-25% volume
Ozone (O3) 0-1, 0-5
Phosgene (COCl2) 0-2
Sulfur dioxide (SO2) 0-50, 0-500
Silan (SiH4) 0-50

Datasheets & User Manuals

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