Extech's CO200 is a Desktop Indoor Air Quality CO2 Monitor. Measurement ranges are 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.
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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.
The importance of air quality for humans
The CO2 concentration in indoor areas is deemed to be an essential indicator of suitable air quality. Carbon dioxide is a gas that is poisonous for humans and, depending on the concentration in the air, affects their performance, their well-being and their ability to concentrate. Even when there is a CO2 concentration as low as 1,000 ppm, most people feel the air is not good and the above-mentioned disorders occur.
Optimal Locations for CO2 Transmitters