Rotronic CF8-W-DISP-GH CO2 Gas Measurement Transmitter (Greenhouse)

Rotronic CF8-W-DISP-GH CO2 Measurement Transmitter

Rotronic CF8-W-DISP-GH CO2 Measurement Transmitter

Rotronic CF8-W-DISP-GH CO2 carbon dioxide measurement instrument is used to measure the quality of air and levels of CO2, particularly in greenhouses.

The indoor air quality (IAQ) sensor is used to measure indoor air carbon dioxide concentration and air temperature within greenhouses.

The Rotronic CF8-W-DISP-GH gas measurement transmitter features self diagnostic procedures and a full system test is carried out every time the device is turned on.

In addition, throughout operation  the sensor probes are checked against failure by checking the valid dynamic measurement ranges.

Rotronic CF8-W-DISP-GH Product Features

  • Model : GH (Greenhouse)
  • Measurement range CO2: 0…4 %vol (0…40,000 ppm)
  • Accuracy: ±200 ppm
  • Temperature measurement range: 0…50 °C (30…120 °F)
  • Output 1 (0…4 %vol): 0/2…10 VDC or 0/4…20 mA
  • Output 2 (0…50 °C): 0/2…10 VDC or 0/4…20 mA
  • Output 3 (CO2): Relay 1: open <1.9 %, closed >2.0 %
  • Range of application: 0…50 °C (30…120 °F) / 0…95 %RH
  • Maintenance: is not necessary for normal indoor applications.Certain industrial applications require annual calibration
    Lifetime: >15 years

Rotronic CF8-W-DISP-GH CO2 Gas Measurement Transmitter With Relay For Use In Greenhouses

The Rotronic CF8-W-DISP-GH CO2 gas measurement transmitter is virtually maintenance free and an internal self adjusting calibration function takes care of the normal long term drift associated with the CO2 sensor.

In order to secure the highest level of accuracy, a time interval of five years is recommended between CO2 calibrations unless a special situation has occurred. A zero calibration can be performed by the use of pure nitrogen or air that has passed through a chemical absorber.

Rotronic CF8-W-DISP-GH CO2 Gas Measurement Transmitter – Technical Specifications

Applications Ventilation control in greenhouses and harsh environments
Measurement Range CO2 0…4 %vol (0…40,000 ppm)
Accuracy ±200 ppm
Temperature Measurement Range 0…50 °C (30…120 °F)
Power Supply 16…29 VDC/AC
Output 1  0/2…10 VDC or 0/4…20 mA
Output 2
Output 3 Relay 1: open <1.9 %, closed >2.0 %
Output 4
Dimensions 142 x 84 x 46 mm
Enclosure Protection IP54
Range Of Application 0…50 °C (30…120 °F) / 0…95 %RH
Communication MODBUS
Maintenance Is not necessary for normal indoor applications. Certain industrial applications require annual calibration.

Rotronic CF8-W-DISP-GH CO2 Measurement Instrument Meter Guidelines

350 – 450 ppm 400 – 1,200 ppm >1,000 ppm 5,000 ppm (0.5 %vol) 38,000 ppm (3.8 %vol) >100,000 ppm (10%vol)
Fresh air outdoors Room air Fatigue and loss of concentration become apparent. Maximum permissible value at the workplace during an 8-hour workday Breathing air (direct exhalation) Nausea, vomiting, loss of consciousness and death



Rotronic devices including transmitters, data loggers and hand held instruments are used for regulating ventilation in living areas, offices, classrooms, cinemas, hospitals and also for measuring CO2 pollution in garages, tunnels and logistics facilities. Rotronic carbon dioxide gas measurement instruments monitor indoor air quality (IAQ) safeguarding the health, productivity and comfort of occupants.

Carbon Dioxide Measurement - Rotronic

Image : Wired


View the current Rotronic catalogue :


T&D distribute Rotronic probes, instruments, transmitters, data loggers, indicators and sensors for the measurement of dew point, flow, air velocity, process pressure, carbon dioxide and temperature. Click an icon for further information…..

Rotronic - Dew Point Measurement

Low Dew Point

Rotronic - Flow Measurement

Flow & Air Velocity

Rotronic - Process Pressure Measurement

Process Pressure

Rotronic - CO2 Measurement

Carbon Dioxide

Rotronic - Temperature Measurement



Data Sheets