CC22 ex Transmitter

Monitoring flammable gases and vapours in Ex zones

If flammable gases and vapours are to be monitored in hazardous areas, the CC22 ex transmitter is a reliable and economical solution. The CC22 ex transmits measured values and status displays analogue (0.2-1 mA or 4-20 mA) or digitally (RS-485). In combination with GfG's proven controllers, installation in new gas detection systems as well as retrofitting in existing systems is possible.

The CC22 ex uses catalytic combustion (CC; also heat tone or HT) to detect flammable gases and vapours such as methane, propane and hydrogen. The long-life sensors make the CC22 ex 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.

Explosion and device protection
The CC22 ex is ATEX certified for use in Ex zone 2. The housing is protected against the ingress of dust and water (protection class: IP65).

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-285 interface (Modbus protocol). The transmitter indicates operating states via a status LED. Service and adjustments are carried out on site using a smartphone app or magnetic pen (one-man adjustment). Test gases can be added for function control with a calibration adapter. If the CC22 ex has been installed near the ceiling, a specially developed remote calibration adapter allows the test gas to be applied without affecting the sensor's stack effect.

Key features at a glance:

General information:

  • measuring principle: catalytic combustion (CC)
  • for flammable gases and vapours
  • expected sensor lifetime: 5 years
  • signal transmission: 0.2-1 mA / 4-20 mA / RS-485
  • protection class: IP65

Approvals / Certifications:

  • ATEX certification: II 3G Ex nA db IIC T4 Gc

Optionally available:

  • optional: calibration adapter, remote 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.


Extensions and accessories

Remote calibration adapter

Remote calibration adapter

To facilitate regular functional checks
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Test gases

Test gases

You can find an overview of our test gases here
» more

Accessories CC22 ex

Accessories CC22 ex

Here you'll find the complete list of accessories for the CC22 ex
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