The Model CO200 checks for carbon dioxide concentrations in indoor environments where high levels of CO 2 are generated. The CO200 features a maintenance-free NDIR (non-dispersive infrared) CO 2 sensor, as well as a visible and audible CO 2 warning alarm with relay output for ventilation control. Indoor air quality is displayed in ppm as Good (380 – 420 ppm), Normal (≤1,000 ppm) or Poor (≥ 1,000 ppm). The unit contains an Automatic Baseline Calibration (minimum CO 2 level over 7. 5 d) or a manual calibration in fresh air, and features a Max/Min CO 2 value recall function. Extech’s CO200 has a temperature range of –4 – 140ºF, a humidity range of 0.1 – 99.9% RH, and a CO 2 range of 0 to 9,999 ppm. — Extech Instruments, Waltham, Mass.
This indoor air-quality monitor senses carbon dioxide
| By Chemical Engineering