Extech CO100: Desktop Indoor Air Quality CO₂

Extech CO100 Desktop Indoor Air Quality  Checks measures Carbon Dioxide (CO2) concentrations,Temperature and Humidity. Maintenance free NDIR (non-dispersive infrared) CO2 sensor. Indoor Air Quality displayed in ppm with Good (0 to 800ppm), Normal (800 to 1200ppm), Poor (>1200ppm) indication.User programmable Visible and Audible CO2 warning alarm.


Tax /GST included

The CO100  is a desktop indoor air quality CO₂ monitor that measures carbon dioxide concentrations (CO₂) from 0 to 9,999ppm, air temperature and humidity. With user programmable visible and audible CO₂ warning alarm. Meter has a maximum/minimum CO₂ value recall function. Maintenance free NDIR (non-dispersive infrared) CO₂ sensor. Complete with Universal AC adaptor.

Application: For HVAC applications, CO2 sensor are used to monitor the quality of air and the tailored need for fresh air respectively.Measuring CO2 sensor levels indirectly determines how many people are in a room, and ventilation can be adjusted accordingly.

In applications where direct temperature measurement is not applicable, NDIR sensor can be used. The sensors absorb ambient infrared thermometer given off by a heated surface.

50 Items

Data sheet

Extech CO100
CO-0 to 9999ppm,Temperature-23 to 122°F (‐5°C to 50°C),Humidity0.1 to 90.0%-
For CO-±75 ppm or ±5% of reading,For Temperature-±1.5°C/2.7°F,For Humidity-±5%
For CO-1ppm,For Temperature-0.1°,For Humidity-0.1%
LCD with backlighting
Operating Temperature
‐5°C to 50 °C (23 oF to 122 oF)
Operating Humidity
< 90 % RH
CO2: NDIR (non‐dispersive infrared) technology
Sampling Interval
2 seconds
Power Supply
110V~220V AC, output 6.0V DC ≥ 500mA (supplied)
117x102x102mm (4.6x4x4")


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