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Comet CO2 Concentration Transmitter with RS485 interface, external carbon dioxide probe, 1m cable


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Comet CO2 concentration transmitter with RS485 interface, external carbon dioxide probe, 1m cable

CO2 - carbon dioxide level sensor.

The device is supplied with CO2 probe with 1m cable. Cable lengths 2 or 4 meters available optionally.

Green LED shines - CO2 concentration 0 to 1000 ppm
Yellow LED shines - CO2 concentration 1001 to 1200 ppm
Red LED shines - CO2 concentration 1201 ppm and more



  • CO2


  • Measuring range 0 to 10 000 ppm
  • Accuracy ±(110ppm +5% from reading) at 25°C and 1013hPa
  • Resolution 1 ppm


  • Operating temperature -30 to +80 °C
  • Channels 1x external CO2 sensor
  • Output RS485
  • Communication protocol ModBus RTU, ARION, Advantech ADAM
  • Power 9-30 Vdc
  • Protection class IP65
  • Dimensions 88,5 x 94 x 39,5 mm
  • External probe cable length CO2 1 meter (optionally 2 or 4 meters)
  • Weight approx. 250 g
  • Warranty 3 years

* the features may vary depending on the device type

  • accurate measurement of Temperature, Relative humidity, Dew point, Atmospheric pressure, CO2, Two-state events
  • industrial or interior design with protection up to IP65
  • integrated sensors, external probe, duct mount design
  • relays output 250Vac / 8A or 50 V on selected models


TSensor (3-4-1-0)

Sensor Reader (2-0-6-0)

Sensor RS485/232 utility (1-0-0-15)

Conversions - application for recalculation of values


3D model T5441

Terms and Conditions COMET System s.r.o.


Instruction Manual

Quick Start Manual

Declaration of Conformity

Description of communication protocols of Tx3xx and Tx4xx transmitters with RS232 and RS485 communication interface



CATALOG - Digital sensors and regulators with serial RS485/RS232 output

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