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Leveling With CO

CO200 indoor air quality monitors

Extech Instruments recently released its CO200, which measures carbon dioxide (CO2) concentrations, air temperature and humidity. The desktop monitor features a maintenance-free, non-dispersive infrared (NDIR) CO2 sensor, as well as a visible and audible CO2 warning alarm with relay output for ventilation control. Indoor air quality is displayed in PPM with Good (380 to 420 PPM), Normal (1,000 PPM) and Poor (1,000 PPM). The CO200 also includes: