... / Portable) Main Features and Specifications:1. Measure concentration of HC, CO, CO2, O2 and NOcontained in exhaust gases from ... NDIR (non-Dispersive Infrared)analysis technology is used to measure HC, CO, CO2and the newest generation of electrochemicaltechnology is adopted ... adaptors.3. DC12V vehicle power inverter. Main Technical SpecificationsMeasuring Range:HC: 0~9,999 ppm (n-Hexane)CO: 0~10 ...