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CO2 concentration transmitter with 4-20mA output T5440 is built in a durable case. Output range is user adjustable. Large dual line LCD is an advantage. Display is possible to switch off. Computerized design ensures maximum long term stability and failure indication.

Measured CO2 concentration values are converted to RS485 serial output. Transmitter circuitry is galvanically isolated from power circuitry to prevent collision in RS485 network.

Method of CO2 sensor multipoint calibration leads to an excellent accuracy measurements of CO2 in the entire of operating temperature range. With this sensor is the device able to meet the demanding requirements for outdoor use. The measurement principle is based on the NDIR principle with dual wavelength, which automatically compensates for aging of the sensor. The sensor is resistant against the pollution and provides maintenance-free operation and excellent long-term stability.

Included in delivery:

  • T5440 sensor
  • Traceable calibration certificate
  • Quick start manual

Transmitter is also equipped with an alarm LED:

  • LED shines green - CO2 concentration 0 to 1000 ppm
  • LED shines yellow - CO2 concentration 1001 to 1200 ppm
  • LED shines red - CO2 concentration 1201 ppm and more

Accessories find here


Type of sensorT5440
OutputRS 485
Measured ValueCO2
Lcd DisplayYes
Range of CO2 concentration measurement0 to 2000 ppm
Accuracy of CO2 concentration measurement±(50 ppm +2 % from reading) at 25 °C and 1013 hPa
Optional range of CO2 concentration measurement0 to 10000 ppm ±(100 ppm +5 % from reading) at 25 °C and 1013 hPa
Measuring interval of CO215 s
Temperature operating range-30 to 60 °C
Communication protocolModBus RTU, ARION and Advantech ADAM compatible protocol
Communication speed110 to 115200 Bd
Ingress protectionIP 30
Power supply9 to 30 Vdc,power consumption approximately 1W
Dimensions88.5 x 94 x 39.5 mm (W x H x D)
Weightapproximately 145 g

Note: Manufacturer reserves the right to make changes in design and technical characteristics of the products. For actual information, please always contact your dealer.


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