CC28 DA Transmitter

With display and alarm for flammable gases

If flammable gases and vapors are to be monitored in Ex zones, the CC28 DA transmitter is a reliable and economical solution. The CC28 DA transmits measured values and status displays analog (4-20 mA). In addition, there is a local indication on the display and, in the event of an alarm, a local alarm via buzzer and red alarm LEDs. The special chimney effect ensures the shortest response times of a few seconds for rapid warning of explosion hazards. In combination with GfG's proven controllers, installation in new gas detection systems as well as retrofitting in existing systems is possible.

The CC28 DA uses catalytic combustion (CC; also heat tone or HT) to detect combustible gases and vapors such as methane, propane and hydrogen. 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 CC28 DA 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). Integrated audible and visual alarms can save the cost of additional explosion-proof alarm devices. Automatic temperature compensation and linearization of the measuring signals ensure high measuring accuracy.

Explosion protection, functional safety and device protection
The CC28 DA has ATEX certification for use in Ex zone 1. Its hardware complies with the European Functional Safety Standard DIN EN 61508-2: 2011 (SIL). The housing is protected against dust and water ingress (protection class: IP64). An optional weatherproof housing provides additional protection.

Communication and service
Signal transmission is based on the analog industry standard (4-20 mA). The transmitter indicates operating states via two status LEDs. Service and settings are performed intuitively on site using three buttons directly on the device (one-man 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 menu of the CC28 DA. Test gases can be fed in for a function check using a flow-through adapter. If the CC28 DA has been installed near the ceiling, a specially developed remote calibration adapter allows the test gas to be supplied without affecting the sensor's stack effect.

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, control buttons, alarm LEDs, alarm horn
  • 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:

  • operating unit RC2, windshield, weatherproof housing, flow-through adapter, remote calibration 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

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 CC28 DA

Accessories CC28 DA

Here you'll find the complete list of accessories for the CC28 DA
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