The principle of the pressure transmitter is different according to the measuring diaphragm. Common ones are ceramic capacitive pressure transmitters, ceramic piezoresistive pressure transmitters and diffused silicon piezoresistive pressure transmitters.
1.A high-precision circuit on the measuring diaphragm converts this tiny deformation to be proportional to the pressure. A highly linear voltage signal, which is also proportional to the excitation voltage, is then converted into an industry-standard 4-20mA current signal or a 1-5V voltage signal.
2.Since the measuring diaphragm adopts standard integrated circuit, which contains linearity and temperature compensation circuit, it can achieve high precision and stability. The loosening circuit adopts a special two-wire chip, which can ensure the output of the two-wire 4-20mA current signal, which is convenient for on-site wiring.
3.The pressure head of the pressure transmitter acts directly on the measuring diaphragm. The surface of ceramic capacitor diaphragm, ceramic piezoresistive diaphragm or diffused silicon piezoresistive diaphragm causes slight deformation of the diaphragm.
4.Pressure transmitters are the most commonly used sensors in industrial applications, widely used in water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military, petrochemical, oil wells, electricity, ships, machine tools, pipelines, etc. industry. According to the different measuring diaphragms, there are common ceramic capacitive pressure transmitters, ceramic piezoresistive pressure transmitters and diffused silicon piezoresistive pressure transmitters.