IR22 Transmitter

Transmitter with infrared sensor for flammable gases and carbon dioxide

If you need to monitor carbon dioxide or flammable gases outside of Ex zones, the IR22 transmitter is a durable and economical solution. The IR22 transmits measured values and status notifications via analog (0.2-1 mA or 4-20 mA) or digital (RS-485) signal. In combination with GfG's reliable controllers, it can be installed in new gas detection systems or retrofitted into existing ones.

The IR22 uses an infrared sensor (IR) to detect carbon dioxide and the combustible gases methane and propane. The long-life sensors make the IR22 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. Its automatic temperature compensation and the linearization of the measuring signals ensure high measuring accuracy.

Functional safety and device protection
The hardware of the IR22 complies with the European Standard for Functional Safety 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 on the analog industrial standard (optionally 0.2-1 mA or 4-20 mA) or the digital RS-485 interface (Modbus protocol). The IR22 uses two status LEDs to indicate its oprating status. The RC22 remote control facilitates service and adjustments on site (one-person adjustment). Test gases for function tests can be inserted using 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
  • 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 for various transmitters
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Test gases

Find an overview of our test gases here
» more

Accessories IR22

Find the complete list of accessories for the IR22 here
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