... Analyzer Measure concentration of HC, CO, CO2, O2 contained in exhaust gases from gasoline engine Ten Years Professional Auto Diagnostic Tools Exporter, we ... Analyzer(4-Gas / Portable) with printer Main Features and Specifications 1. Measure concentration of HC, CO, CO2, O2 contained in exhaust gases from ... H) × 450mm(D) MST-406EN Automotive Emission Analyzer(4-Gas/Portable) auto exhaust gas analyzer