Torque sensor is a kind of precision measuring instrument for measuring various torques, rotational speeds and mechanical power. Torque sensor is divided into static torque sensor and dynamic torque sensor. Dynamic torque sensor can run at high speed for a long time and output positive and negative torque signals. The application range is very wide, mainly used in: 1, motor, engine, internal combustion engine and other rotary power equipment output torque and power detection; 2, fan, water pump, gear box, torque plate hand torque and power detection; 3. Test the torque and power of railway locomotive, automobile, tractor, aircraft, ship and mining machinery; 4, can be used for the detection of torque and power in sewage treatment system; 5, can be used to manufacture viscometers; 6, can be used in process industry and process industry.