It is designed for Environmental Protection Departments, Auto and Motorcycle Manufacturers, Auto-repair Enterprises, Police and Traffic Test Stations and scientific Research Departments to test auto emission during repairing, inspecting and examining on road testing and science research.

HC, CO, CO2 are measured by NDIR method and O2, NO are measured by electrochemistry method. High accuracy, with automatic compensation for pressure and temperature. With high stability and automatic zeroing, there is no need to frequently calibrate it with standard gas. It can be used to measure the vehicles which use liquiefied petroleum gas (LPG) and compressed natural gas (CNG) as well as alcohol as their fuel. It can be powered by battery so that it is covenient for mobile monitoring station to use (with optional DC-AC converter). It can be equipped with external printer (optional). It has an automatic recording and testing function.