EC22 D Transmitter

Transmitter with display for toxic gases, oxygen and hydrogen

If toxic gases, oxygen or hydrogen are to be monitored outside Ex zones, the EC22 D transmitter is a reliable and economical solution. The EC22 D transmits measured values and status displays analogue (0.2-1 mA or 4-20 mA) or digitally (RS-485). In addition, there is an on-site indication on the display and, in the event of an alarm, a local warning via buzzer. In combination with GfG's proven controllers, installation in new gas detection systems as well as retrofitting in existing systems is possible.

The EC22 D uses the electrochemical process (EC) to detect toxic gases such as carbon monoxide as well as oxygen and hydrogen. The current measured value can be read at any time on the 2.2-inch display, which lights up red in the event of an alarm. The different sensors measure a variety of gases in measuring ranges such as 0 to 2,000 ppm or 0 to 25 % by volume. Automatic temperature compensation and linearisation of the measuring signals ensure high measuring accuracy.

Functional safety and device protection
The hardware of the EC22 D complies with the European Functional Safety Standard DIN EN 61508-2: 2011 (SIL). The housing is protected against the ingress of dust and water (protection class: IP54). An optional weatherproof housing provides additional protection.

Communication and service
Signals are transmitted according to the analogue industrial standard (optionally 0.2-1 mA or 4-20 mA) or via the digital RS-485 interface (Modbus protocol). The transmitter indicates operating states via two status LEDs. Service and settings are carried out intuitively on site with a built-in touch-button interface (one-man adjustment). The multi-coloured backlit display shows the current measured value, status messages and the menu of the EC22 D. Test gases can be applied for function control with a calibration adapter.

Key features at a glance:

General information:

  • measuring principle: Electrochemical (EC)
  • for toxic and combustible gases, oxygen
  • expected sensor lifetime: 2-3 years
  • 2.2-inch colour display, built-in push-button interface, buzzer
  • signal transmission: 0.2-1 mA / 4-20 mA / RS-485
  • protection class: IP54

Approvals / Certifications:

  • SIL 1/2 (hardware)

Optionally available:

  • RC22 operating unit, weatherproof housing, calibration adapter

Detectable gases

Cl2 Chlorine
ClO2 Chlorine dioxide
CO Carbon monoxide
F2 Fluorine
H2 Hydrogen
H2S Hydrogen sulfide
HCl Hydrogen chloride
HCN Hydrogen cyanide
NH3 Ammonia
NO Nitric oxide
NO2 Nitrogen dioxide
O2 Oxygen
O3 Ozone
SiH4 Silane
SO2 Sulfur dioxide
Other gases on request.


Extensions and accessories

Weatherproof housing

Weatherproof housing

Weatherproof housing for various transmitters
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Test gases

Test gases

You can find an overview of our test gases here
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Accessories EC22 D

Accessories EC22 D

Here you'll find the complete list of accessories for the EC22 D
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