CO210 Desktop Indoor Air Quality CO₂

The Extech CO210 is a desktop indoor air quality CO2 monitor/datalogger. The CO210 has a measurement ranges from 0 to 9,999 ppm (CO2), 14 to 140°F (-10 to 60°C) for air temperature and 0.1 to 99.9% for relative humidity. It features Minimum/Maximum CO2 value recall, Year/Month/Date/Time display, and an automatic baseline calibration (minimum CO2 level over 7.5 days) or manual calibration in fresh air. Comes with AC adapter and user manual.


  • Checks for Carbon Dioxide (CO₂) concentrations
  • Maintenance free NDIR (non-dispersive infrared) CO₂ sensor
  • Indoor Air Quality displayed in ppm with Good (380 to 420ppm), Normal (<1000ppm), Poor (>1000ppm) indication
  • User programmable High/Low Visible and Audible CO₂ warning alarms
  • Measurement ranges:

CO₂: 0 to 9999ppm

Temperature: 14 to 140°F (-10 to 60°C)

Humidity: 0.1 to 99.9%RH

  • Displays Year, Month, Date, and Time
  • Max/Min CO₂ value recall function
  • Automatic Baseline Calibration or manual calibration in fresh air
  • Complete with Universal AC adaptor, software and cable