Carbon Dioxide (CO2 ) Transmitter IP65 with infrared sensor CDD-series

Carbon Dioxide (CO2) transmitter CDD for wall mounting

Carbon Dioxide (CO2) transmitter CDD with
Duct Mounting Set DMS 300G for duct mounting

Duct Mounting Set DMS 300G


Carbon Dioxide (CO2) transmitters CDD-series with two-beam infrared sensor for the continuous monitoring of the ambient air to detect carbon dioxide concentrations.

The infrared measuring method with integrated temperature and drift compensation stands for highest accuracy, selectivity and reliability despite of the calibration interval of 5 years.

The Carbon Dioxide (CO2) transmitters CDD-series possesses a standard analog output (0)2-10 Vdc or (0)4-20 mA, and an RS-485 interface. 2 relays with adjustable switching thresholds as well as an integrated display are available as options.


Carbon Dioxide (CO2) transmitter CDD-series for detecting leakages in refrigeration plants with carbon dioxide as refrigerant, and also within a wide range of commercial and industrial applications.

The measuring ranges 0-2000 ppm and 0-5% vol. is provided for the indoor air quality control.

Due to the standard analog signal (0)2-10 Vdc or (0)4-20 mA and the RS-485 serial interface the Carbon Dioxide CO2 transmitter CDD-series is compatible to controllers or automation systems.


• Measuring ranges 0-2000 ppm or 0-5% vol.

• Two-beam infrared sensor (NDIR)

• Output(0)2-10 Vdc or (0)4-20 mA, jumper selectable

• Power supply (18-28 Vac/dc)

Options for Carbon Dioxide (CO2) transmitter CDD-series:

• Relay Pack (2 alarm relays)

• Buzzer/Siren (built-in, in front of cover)

• LCD display (built-in, in front of cover)

• LED indicator (built-in, in front of cover)

• Heating

• RS-485 Modbus

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