CS22 D Transmitter

Transmitter with display for monitoring refrigerants

If toxic and flammable gases and vapours are to be monitored outside Ex zones, the CS22 D transmitter is a reliable and economical solution. The CS22 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 alarm 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 CS22 D uses chemosorption (CS) to detect flammable and toxic gases such as ammonia, methane and numerous refrigerants. 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 CS22 D an economical solution for detecting a wide range of gases in measuring ranges such as 0 to 5,000 ppm, 0 to 100 LEL or 0 to 1 % by volume. Automatic temperature compensation and linearisation of the measurement signals ensure high measurement accuracy.

Functional safety and device protection
The hardware of the CS22 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 multicolour backlit display shows the current measured value, status messages and the menu of the CS22 D. Test gases can be applied for function control with a calibration adapter.

Key features at a glance:

General information:

  • measuring principle: Chemosorption (CS)
  • for toxic and flammable gases and vapours
  • expected sensor lifetime: 5 years
  • 2.2-inch colour display, built-in touch-button interface, buzzer
  • signal transmission: 0.2-1 mA / 4-20 mA / RS-485
  • protection class: IP54

Approvals / Certifications:

  • SIL 2/3 (hardware)

Optionally available:

  • RC22 operating unit, weatherproof housing, calibration adapter

Detectable gases

n-Hexane 0 to 100 % LEL
R-23 0 to 1000 ppm
R-1234yf 0 to 1000 ppm
R-1234ze 0 to 1000 ppm
R-134a 0 to 1000 ppm
0 to 2000 ppm
0 to 5000 ppm
R-404A 0 to 1000 ppm
0 to 2000 ppm
R-407C 0 to 1000 ppm
R-410A 0 to 1000 ppm
R-438A 0 to 1000 ppm
R-448A 0 to 1000 ppm
R-449A 0 to 1000 ppm
R-454B 0 to 1000 ppm
0 to 2000 ppm
R-507[A] 0 to 1000 ppm
R-717 (ammonia) 0 to 300 ppm
0 to 1000 ppm
0 to 3000 ppm
0 to 1,000 % 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 CS22 D

Accessories CS22 D

Here you'll find the complete list of accessories for the CS22 D
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