... Main Features and Specifications:1. Measure concentration of HC, CO, CO2, O2 and NOcontained in exhaust ... Infrared)analysis technology is used to measure HC, CO, CO2and the newest generation of ... DC12V vehicle power inverter. Main Technical SpecificationsMeasuring Range:HC: 0~9,999 ppm (n-Hexane)CO ... 0~25 % NO: 0~5,000 ppm Measurement Accuracy:HC: ±12 ppm (abs.) 0~2,000 ppm±5 % ( rel ...