IR22 D Transmitter

Transmitter with display for flammable gases and carbon dioxide

If carbon dioxide or flammable gases are to be monitored outside Ex zones, the IR22 D transmitter is a reliable and economical solution. The IR22 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 IR22 D uses an infrared sensor (IR) to detect carbon dioxide and the combustible gases methane and propane. 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 long-life sensors make the IR22 D an economical solution for detecting gases in measuring ranges such as 0 to 10,000 ppm, 0 to 100 LEL or 0 to 50 % by volume. Automatic temperature compensation and linearisation of the measuring signals ensure high measuring accuracy.

Functional safety and device protection
The hardware of the IR22 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 push-nutton interface (one-man adjustment). The multi-coloured backlit display shows the current measured value, status messages and the menu of the IR22 D. Test gases can be applied for function control with a calibration adapter.

Key features at a glance:

General information:

  • measuring principle: Infrared (IR)
  • for carbon dioxide and flammable gases
  • expected sensor lifetime: > 5 years
  • colour 2.2-inch display, built in push-button interace, 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

CH2F2 Difluormethane/R32
  0 to 100 % LEL
0 to 14,0 % by volume
CH4 Methane
  0 to 100 % LEL
0 to 5,0 % by volume
CO2 Carbon dioxide
  0 to 1,0 % by volume
0 to 5,0 % by volume
0 to 10,0 % by volume
0 to 25,0 % by volume
0 to 50,0 % by volume
C3H8 Propane
  0 to 100 % LEL
0 to 2,0 % by volume
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 IR22 D

Accessories IR22 D

Here you'll find the complete list of accessories for the IR22 D
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