... exhaust gas analyzer used to measure the concentration of HC,CO,CO2,O2 SV-4Q automobile exhaust gas ... micro-computer analysis, directly measure the thickness of HC, CO and CO2 in the exhaust gas of ... error,0-10%) CO2:±5% (relative error,0-20%)HC:±5%(relative error ,0-4000ppm)±10% (relative error, ... 0°C~40°Chumidity:≤95%Air pressure:60~105kPapower:AC 220V±10%;50Hz7,Preheat time: 5min 8,Sampling method: ...