226585317R Thermocouple-EGT-Sensor

The thermocouple exhaust gas temperature (EGT) sensor is a robust and widely used device in automotive applications for measuring high exhaust temperatures. Based on the Seebeck effect, it generates a millivolt signal proportional to the temperature difference between its hot junction (exposed to exhaust gases) and cold junction (connected to the ECU). Common types include K-type and N-type thermocouples, known for their durability and wide operating range (-40°C to +1200°C).

Key advantages include fast response time, high-temperature tolerance, and simple construction without external power requirements. The sensor is critical for protecting turbochargers, optimizing DPF regeneration, and monitoring SCR system efficiency. Its rugged design withstands extreme vibration, thermal shock, and corrosive exhaust environments. Integrated with the engine management system, it ensures precise temperature feedback for emission control and engine protection. Thermocouple EGT sensors are essential for modern diesel and gasoline engines to meet Euro 6/China 6 emission standards while maintaining optimal performance and fuel economy.