From the Manufacturer
This Desktop CO2 Meter is used to monitor air quality in schools, office buildings, greenhouses, factories, hotels, hospitals and anywhere that high levels of carbon dioxide are generated. It uses a maintenance-free NDIR sensor and has user-settable high/low warning alarms with a relay output for ventilation control. Air Quality is displayed in ppm with Good (380 to 420ppm), Normal (<1000ppm), Poor (>1000ppm) indication. Measurement ranges are 0 to 9,999ppm (CO2), 14 to 140°F (-10 to 60°C)for Air Temperature and 0.1 to 99.9% for Relative Humidity. It features Min/Max 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 complete with AC adapter.
Checks for Carbon Dioxide (CO2) concentrations with Max/Min value recall function
Maintenance free NDIR (non-dispersive infrared) CO2 sensor
Indoor Air Quality displayed in ppm with Good (380 to 420ppm), Normal (1000ppm) indication
Displays Year, Month, Date, and Time
Automatic Baseline Calibration (minimum CO2 level over 7.5 days) or manual calibration in fresh air
