Differential pressure sensor is able to feel the pressure signal, and in accordance with certain laws will be converted to the pressure signal available output of the electrical signal device or device. Pressure sensor is the most commonly used in industrial practice of a sensor, which is widely used in a variety of industrial automation environment, involving water conservancy and hydropower, railroad transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries. Pressure relay is the use of liquid pressure to open and close the electrical contacts of the hydraulic electrical conversion components. When the system pressure reaches the setting value of the pressure relay, an electrical signal is issued, so that the electrical components (such as electromagnets, motors, time relays, electromagnetic clutches, etc.) action, so that the oil circuit to unload the pressure, reversal of direction, the implementation of sequential action of the components to achieve, or shut down the motor so that the system stops working, and play a role in the safety and protection, and so on. Pressure switch is a combination of electrical switch, based on the size of the preset pressure, automatic connection or disconnection device. Pressure sensors can turn the pressure signal into an analog or digital signal, sent to the back-end processing; and pressure switches and pressure relays, can only be given in the user’s pressure, open or close the switch, used for simple bit control (switch control). Pressure relays can provide more output nodes or node types than pressure switches. Star Instrument Sensor Manufacturing Co., Ltd. is a high-tech enterprise integrating R&D, production and sales. We specialize in the production of pressure transmitters, level transmitters, temperature transmitters, temperature and humidity transmitters, differential pressure transmitters, soil moisture transmitters, 3051 transmitters and related instrumentation accessories. Many products under the brand of Star Instruments have obtained a number of patents issued by the state, such as CE certification, IS9001 certification, SGS certification, TüV SüD certification, explosion-proof certification and so on. For product consultation, product customization, agency, technical inquiries, quotations, etc., please contact Star Instruments: 400-600-4496 !