... analyzerSV-5Q automobile exhaust gas analyzer, in accordance with non-light-disguising infrared absorption method, via micro-computer analysis, directly measure ... it’s convenient to use. The analyzer has small size, light weight, storage of 500 groups’ data of exhaust gas measurement ... -5Q full-automatic automobile exhaust gas analyzer SHENGWEI Tester Meter Detector 5gas CO,CO2, HC, O2, NOx