Double metal bar and metal tube sensor with increasing temperature, the metal tube (material A) length increases, without expansion steel (metal B) does not increase the length, so that due to the change in position, the linear expansion of the metal tube can be delivery. Conversely temperature sensor working principle, which can be converted into a linear expansion of an output signal. Sensor deformation curve of liquid and gas design changes in temperature, liquid and gas will also produce a corresponding change in volume. Various types of structures can be converted into a variation of this expanded position changes, thus generating change in output position (potentiometer, sensor bias, the baffle plate, etc.). Development in recent years, China's industrial modernization process and the electronic information industry continuously high growth temperature sensor prices, led to the rapid rise in the sensor market. Temperature sensor as a sensor in an important class of temperature sensors, accounting for over 40% of the total demand of the sensor. NTC temperature sensor is the use of resistance varies with temperature characteristics of the non-electrical quantities converted to electrical quantities, which can accurately measure the temperature of the semiconductor device and automatic control. Temperature sensor uses a very broad, can be used to measure and control temperature, temperature compensation, velocity, flow and wind speed measurement, level indication, temperature measurement, ultraviolet and infrared light to measure the microwave power measurements are widely used in TV, PC color monitors, switching power, water heater, refrigerator, kitchen equipment, air conditioning, automotive and other fields. In recent years, the rapid growth of automotive electronics, consumer electronics industry led to the rapid growth of China's demand for temperature sensors. Temperature sensor works, Xinfeng (certified), Luohe, Xinxiang City, Xinfeng temperature sensor by sensor provides purification technology Limited. Xinxiang City Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) is an industry leader in Henan Xinxiang, sensors, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xinfeng leadership with the staff warmly welcome all inquiries negotiations to create a better future Xinfeng.