... 2.composed of power, air chamber, detector TH2004Infrared Absorption CO Analyzer belongs to non-scattered infrared analyzer, ... function Operating principle:TH-2004Infrared Absorption CO Analyzer adopts the non-infrared absorption method. The basic operation principle ... emission. main technical parameters:measuring method non-infrared absorption method.(NDIR)rate capacity0~50ppm(extended)nose0.2ppmrise ...