5WK9 6619D Auto Parts Sensor  

   NOx sensor is referred to as NOx sensor for short. NOx sensor is a sensor used to detect the content of nitrogen oxides (NOx) such as N2O, no, NO2, N2O3, N2O4 and N2O5 in engine exhaust. According to the working principle, it can be divided into electrochemical, optical and other NOx sensors. NOx sensor is one of the key sensors to realize the National IV emission standard and national V emission standard of diesel vehicles. It is also one of the most key components in SCR post-treatment system. It is used to measure the nitrogen and oxygen concentration in the engine exhaust to meet the needs of closed-loop control of engine aftertreatment system and on-board OBD diagnosis system. It is generally installed at the rear end of the catalyst in the exhaust pipe. It can be applied to gas engine or diesel engine. Its structure includes ceramic probe, cable and processing chip controller, which is connected with ECU through can communication.