CC22 D Transmitter
Transmitter with display for monitoring flammable gases
If flammable gases and vapours are to be monitored outside Ex zones, the CC22 D transmitter is a reliable and economical solution.The CC22 D transmits measured values and status displays in 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 CC22 D detects combustible gases and vapours such as methane, propane and hydrogen by means of catalytic combustion (CC; also heat tone or HT). 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 CC22 D an economical solution for detecting a wide range of combustible gases in the measuring ranges 0 to 100 % LEL and 0 to 4 % by volume (NH3). Automatic temperature compensation and linearisation of the measuring signals ensure high measuring accuracy.
Functional safety and device protection
The hardware of the CC22 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-button interface (one-man adjustment). The multi-coloured backlit display shows the current measured value, status messages and the menu of the CC22 D. Test gases can be applied for function control with a calibration adapter.
Key features at a glance:
General information:
- measuring principle: catalytic combustion (CC)
- for flammable gases and vapours
- expected sensor lifetime: 5 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 2/3 (hardware)
Optionally available:
- RC22 operating unit, weatherproof housing, calibration adapter

Detectable gases
LEL | combustible gases |
C2H2 | Acetylene |
C2H4 | Ethylene |
C2H6O | Ethanol |
C2H6 | Ethane |
C3H6O | Acetone |
C3H6O2 | Ethyl formate |
C3H6O2 | Methyl acetate |
C3H8 | Propane |
C4H8O | Methyl ethyl ketone |
C3H8O | Isopropanol |
C4H8O2 | Ethyl acetate |
C4H10 | Butane |
C4H10O | n-Butanol |
C5H12 | Pentane (n) |
C6H12O | Methyl isobutyl ketone (MIBK) |
C6H14 | n-Hexane |
C7H8 | Toluol |
C7H16 | Heptane |
C9H20 | n-Nonane |
CH4 | Methane |
CH4O | Methanol |
H2 | Hydrogen |
NH3 | Ammonia |
Other gases on request.
Downloads
Extensions and accessories
Weatherproof housing
Weatherproof housing for various transmitters
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Test gases
You can find an overview of our test gases here
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Accessories CC22 D
Here you'll find the complete list of accessories for the CC22 D
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