Extech CO200 Desktop Indoor Air Quality CO2 Monitor

Measures Carbon Dioxide (CO2), Air Temperature and Humidity with user-settable high / low alarms.

Features:

• 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.
• Visible and Audible CO2 warning alarm with relay output for ventilation control
• Displays Year, Month, Date and Time
• Max / Min CO2 value recall function
• Auto Baseline Calibration (minimum CO2 level over 7.5 days) or manual calibration in fresh air
• Complete with universal AC adapter.
• °C / °F Switch-able