Pressure sensors are the most commonly used industrial practice a sensor, which is widely used in various industrial automation environment, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil, electricity, shipbuilding, machine tools many industry pipelines, following a brief introduction of some commonly used sensor principle and its application. Pressure sensors are the most widely used kind of sensor. Conventional pressure sensor to the mechanical structure of the device main type pressure sensor price, indicating a deformation of the elastic pressure member, but this structure size, quality, weight, do not provide an electrical output. With the development of semiconductor technology, semiconductor pressure sensor also emerged. It features small size, light weight, high accuracy, good temperature characteristics. Especially with the development of MEMS technology, semiconductor sensors toward miniaturization, and its small power consumption, high reliability. Wiring sensor has always been one of the most customer problems consult the procurement process, many customers do not know how the sensor connection, in fact, a variety of sensor wiring are basically the same, pressure sensors generally have a two-wire, three-wire, four-wire, and some have five-wire system. Two-wire pressure sensor is relatively simple, general customers know how wiring pressure sensor applications, a cable to connect the positive power supply, and the other line is the signal line through the instrument is connected to the negative power supply pressure sensor, which is the most simple, the pressure sensor three-wire system is based on two-wire plus a line, this line is directly connected to the negative power supply, compared with two-wire a little trouble. Four-wire pressure sensor must be two power inputs, the other two are the signal outputs. Four-wire voltage output instead of mostly 4 ~ 20mA output, 4 ~ 20mA called pressure transmitter, most made of two-wire system. Some of the pressure sensor output signal is amplified without full-scale output is only tens of millivolts, and some internal pressure sensor amplifier circuit pressure sensor wiring methods, full-scale output of 0 ~ 2V. As to how to the display meter, depending on the range of the instrument is how much, if any, and the output signal compatible gear, it can be measured directly, or to add signal conditioning circuitry. Five-wire and four-wire pressure sensor or less, five-wire sensor market is relatively small. Pressure sensor pressure sensor works _ _ Beijing Xinfeng Xinfeng sensing provided by Xinxiang purification technology Limited. Xinxiang City Xinfeng purification Sensing Technology Co., Ltd. (www.xfcgq.com) strong, credible, Xinxiang in Henan sensor industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement will lead Xinfeng innovative ideas into the brilliant and you work for a better future!