The Extech CO100 air quality meter checks for carbon dioxide (CO2) concentrations using a maintenance free non-dispersive infrared (NDIR) CO2 sensor. This neat desktop unit displays indoor air quality in ppm with Good (0 to 800ppm), Normal (800 to 1200ppm), and Poor (>1200ppm) indication. If required poor air quality will trigger a visible and audible CO2 warning alarm. Complete with universal AC adaptor. * CO2 range 0 to 9,999ppm * Temperature range -5 to +50°C (23 to 122°F) * Humidity range 0.1 to 90%RH * Displays year, month, date, and time * Max/Min CO2 value recall function * Dimensions 110 x 105 x 61mm * Weight 230g https://elecena.pl/product/27788203/extech-co100-air-quality-meter 2025-02-03 https://elecena.pl/product/27788203/extech-co100-air-quality-meter 2025-05-07 https://elecena.pl/product/27788203/extech-co100-air-quality-meter 2025-06-12 https://elecena.pl/product/27788203/extech-co100-air-quality-meter 2025-07-21 https://elecena.pl/product/27788203/extech-co100-air-quality-meter 2025-10-12