... NDIR and Electrochemical Sensor to analyze the main component of automobile gas emission: CO,CO2,HC, O2 and NOx ... range, the instrument is applicable to motorcycle and various of automobile emission test.6. Adopting special filtering device to ... Analyzer has printer, which can automatically print the average of test data.8. Analyzer has USB, so the ... 5%2.5%12s5%5% TH-500 Automobile Emission Gas Analyzer