H5021 Concentration Transmitter with two Relay Outputs View larger

H5021 Concentration Transmitter with two Relay Outputs


Comet System


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Concentration Transmitter with two Relay Outputs ((0 to 10000ppm)

The CO2 - carbon dioxide level is recently regarded as an important parameter that substantially determines the quality of the interior climate. Especially in buildings where many people gather, such meeting rooms, hospitals, schools, cinemas, theatres and care centres. With the help of CO2 sensor engineers, technical advisors, environmental experts and health specialists can optimize the ventilation for creation of a healthy interior climate.

Method of CO2sensor multipoint calibration leads to an excellent accuracy measurements of CO2in 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.

With Display LCD
IP Classification IP65
The Sensor measures: CO₂ (Carbon Dioxide)
Output Signal: Relays
Power Supply: 9-30 Vdc

APPLICATIONS - measuring of CO2 level at:

  • building HVAC management
  • climate technology
  • schools, universities
  • meeting rooms, hospitals, cinemas, theatres
  • weather stations

Transmitter is equipped with two relay outputs for alarm indication or control of external devices. For each relay setting of delay, hysteresis, audible alarm is enabled. 
Parameters are easy adjustable from regulator keyboard or from the computer.

Transmitter contains a microprocessor based control circuitry in a durable plastic case with connection terminals.

The CO2 concentration sensor is built inside the case.

Large dual line LCD is an advantage. Display is possible to switch off. Computerized design ensures maximum long term stability and failure indication.

Output None
Measured Value CO2
Construction Type For External Probes
Design Industrial
Temperature Measuring Range None
Relay Output Yes
Two-State Input No
Lcd Display Yes
PoE No
Maximum switching voltage, current, power of relay output 50V, 2A, 60VA
Audible alarm from built-in beeper - switchable
Range of CO2 concentration measurement 0 to 10000ppm
Accuracy of CO2 concentration measurement ±(100ppm +5% from reading) at 25°C and 1013hPa
Temperature operating range -30 to +60°C
Measuring interval of CO2 15s
IP protection IP65
Power 9-30Vdc, power consumption approximately 1W
Dimensions 136 x 150 x 45 mm (W x H x D)
Weight approximately 360g
Warranty 2 years

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