M-1 CO2 Monitor


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The Green Eye measures and logs the CO₂ level, air temperature and humidity in your room, displaying the values at a glance on its clear display. This monitor from TechGrow’s Green series has an internal, stable non-dispersive infrared (NDIR) sensor for CO₂ detection. The smart Automatic Baseline Calibration (ABC) function ensures it always displays the correct CO2 value.

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M-1 CO2 Monitor

The M-1 CO2 Monitor is ideally suited for measuring the air quality in buildings such as offices, schools, crèches, hospitals and storage areas. A measurement is taken every second and will provide you with detailed information about CO2 concentration, air temperature, relative humidity, dew point temperature and wet bulb temperature.

The M-1 CO2 Monitor is plug & play and easy to use. The display has 3 windows for simultaneous reading of different values. The M-1 CO2 monitor also displays the minimum, maximum and average values of CO2, air temperature and relative humidity, taking the weighted average of both the last 15 minutes and 8 hours.

The relay for external switching allows you to easily connect the M-1 CO2 Monitor to a ventilation system. When the CO₂ value exceeds the set upper limit, this will cause an optical and audible alarm. The relay receives the alarm automatically and is switched. The relay will be turned off when the COvalue falls below the lower alarm limit.

Finally, the M-1 COMonitor has Automatic Baseline Calibration (ABC function) and the possibility to manually calibrate the CO2 sensor, to ensure the most accurate measurement. It is assumed that fresh air with a value of approximately 400 ppm will be present in the ventilated space for some time during the calibration cycle. This makes this monitor unsuitable for use in enclosed spaces with high CO₂ values, such as greenhouses.



  • The display shows CO₂ value, temperature and humidity (min/max and weighted averages of 15 minutes/8 hours)
  • Provides information about dew point and wet bulb temperature
  • Readout in °C or °F
  • The display has 3 windows for simultaneous reading of the values
  • Stable NDIR sensor for CO₂ detection
  • Measurement frequency: 1 measurement per second
  • Optical and acoustic alarm for CO₂
  • Can be connected to a ventilation system
  • Alarm output for ventilation control
  • ABC (Automatic Baseline Calibration) and manual CO₂ calibration
  • The monitor is equipped with a relay for external switching

Additional information

Weight 0.4 kg
Dimensions 15 × 12 × 11.5 cm
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