• CO100
  • Manufacturer has 50 in stock
    This stock is typically available to ship in 3 - 5 working days.



  • Displays Year, Month, Date, and Time
  • Max/Min CO2 value recall function
  • Automatic Baseline Calibration (minimum CO2 level over 7.5 days) or manual calibration in fresh air
  • Complete with Universal AC adaptor


The Extech CO100 Desktop Indoor Air Quality CO2 Monitor checks for Carbon Dioxide (CO2) concentrations while using a maintenance free NDIR (non-dispersive infrared) CO2 sensor. Indoor Air Quality is displayed in ppm with Good (0 to 800ppm), Normal (800 to 1200ppm), Poor (>1200ppm) indication. The CO100 has a visible and audible CO2 warning alarm.

Measurement ranges:

  • CO2: 0 to 9,999ppm
  • Temperature: 14 to 140°F (-10 to 60°C)
  • Humidity: 0.1 to 99.9%RH

Applications includes monitoring air quality in:

  • schools
  • office buildings
  • greenhouses
  • factories
  • hotels
  • hospitals
  • transportation lines
  • anywhere that high levels of carbon dioxide are generated


This product can be used in the following applications: