SV-5Q automobile tail gas analyzer introduces in world-leading foreign advanced technology and whole set of imported parts. It can analyze five kinds of compositions in the tail gas, and has a large liquid crystal display screen with whole Chinese menu. The analyzer has the function of automatic zero adjustment alarm for each half hour, and it can be connected with computer through RS-232 plug, and there is a mini printer inside. SV-5Q can test the temperature of the petrol and the speed of engine. The equipment can test the tail gas from the automobiles use liquefied petroleum gas or compressed natural gas as fuel, so it is the best choice of institutions of environmental protection or scientific research and 3S, 4S station.