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Extech CO100 Desktop Air Quality Meter EXTECH CO100 The Extech CO100 air quality meter checks for carbon dioxide CO sub 2 sub concentrations using a maintenance free non dispersive infrared NDIR CO SUB 2 SUB sensor This neat desktop unit displays indoor air quality in ppm with Good 0 to 800ppm Normal 800 to 1200ppm and Poor gt 1200ppm indication If required poor air quality will trigger a visible and audible CO SUB 2 SUB warning alarm Complete with universal AC adaptor E
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