I. Introduction The analyzer is based on NDIR (Non-dispersive Infrared) technology able to measure concentration of gases including CO,CH4,CO2,SO2,NO etc. It has features of high measure accuracy, outstanding reliability, fast response time and wide applicable scope. All indexes reach or exceed those of domestic & foreign similar products, and fully qualify measurement technology index of low emission monitoring occasions. II. Application fields It mainly used for industrial boilers, industrial furnaces emissions monitoring in power plant, iron & steel factory, cement plant and son.