CC28 D Transmitter

Flammable gases in Ex zones safely under control

If flammable gases and vapors need to be monitored in Ex zones, the CC28 D transmitter is a reliable and economical solution. The CC28 D uses analog signals (4-20 mA) to provide measured values and status information. Readings are also shown on the display on site. The special stack effect ensures very short response times of only a few seconds for fast warning of explosion hazards. In combination with GfG's reliable controllers, it can be installed in new gas detection systems or retrofitted into existing ones.

The CC28 D uses catalytic combustion (CC) to detect combustible gases and vapours such as methane, propane and hydrogen. While in operation, its 2.2-inch display indicates the current measured value and will  light up red in the event of an alarm. The long-life sensors make the CC28 D an economical solution for detecting a wide range of combustible gases in the measuring ranges of 0 to 100 % LEL and 0 to 4 % by volume (NH3). Its automatic temperature compensation and the linearization of the measurement signals ensure high measurement accuracy. 

Functional safety and device protection
The CC28 D is ATEX certified for use in Ex Zone 1 and its hardware complies with the European Functional Safety Standard DIN EN 61508-2: 2011 (SIL). The housing is protected against ingress of dust and water (protection class: IP64). An optional weatherproof housing provides additional protection.

Communication and service
Signals are transmitted via the analog industry standard (4 to 20 mA). The CC28 D uses two status LEDs to indicate its operating status. Service and settings are performed intuitively on site using three buttons directly on the device (one-person adjustment). The pre-adjusted sensors can be easily replaced thanks to Smart Sensor technology. The multicolor backlit display shows the current measured value, status messages and the CC28 D menu. Test gases for function tests can be inserted using a flow adapter.

Key features at a glance:

General information:

  • Measuring principle: catalytic combustion (CC)
  • For combustible gases and vapors
  • Short response time due to stack effect
  • Color 2.2 inch display, touchbutton interface
  • Expected lifetime of sensors: 5 years
  • Signal transmission: 4-20 mA
  • Protection class: IP64

Approvals / Certifications:

  • ATEX certification: II 2G Ex demb [ib] IIC T4 Gb
  • SIL 2/3 (hardware)

Optionally available:

  • RC2 operating unit, windshield, weatherproof housing, flow adapter

Detectable gases

LEL combustible gases
C2H2 Acetylene
C2H4 Ethylene
C2H6O Ethanol
C2H6 Ethane
C2H6O Dimethyl ether
C3H4 Propine
C3H6 Propene
C3H6O Acetone
C3H6O2 Methyl acetate
C3H8 Propane
C3H8O n-Propanol
C4H8O 2-Butanon (MEK)
C4H8O2 Ethyl acetate
C4H10 n-Butane
C4H10O n-Butanol
C5H12 Pentane (n)
C6H6 Benzene
C6H12 Cyclohexane
C6H12O Methyl isobutyl ketone (MIBK)
C6H14 n-Hexane
C7H8 Toluene
C7H16 n-Heptane
C8H18 Octane (n)
C9H20 n-Nonane
CH4 Methane
CH4O Methanol
CO Carbon monoxide
H2 Hydrogen
NH3 Ammonia
Other gases on request.


Extensions and accessories

Remote calibration adapter

To facilitate the regular function check of transmitters
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Weatherproof housing

Weatherproof housing for various transmitters
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Test gases

Find an overview of our test gases here
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Accessories CC28

Find the complete list of accessories for the CC28 here
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