The current types of pressure transmitters are broadly divided into: resistance strain gauge pressure transmitters, semiconductor strain gauge pressure transmitters, piezoresistive pressure transmitters, inductive pressure transmitters, capacitive pressure transmitters, and resonances. Pressure transmitters and capacitive acceleration sensors.

　 The main function of the pressure transmitter is to transmit the pressure signal to the electronic device. The basic principle is: convert the hydraulic pressure of this pressure into the current (4-20mA). The pressure of the electronic signal is linear with the voltage or current. , is generally proportional to the relationship, therefore, the voltage or current output from the transmitter increases with pressure, which results in a relationship between pressure and voltage or current. High and low pressure chambers, low pressure chamber pressure using atmospheric pressure or vacuum, the role of the δ element (ie, the sensor) on both sides of the isolation diaphragm, through the spacer and the components of the filling liquid delivered to both sides of the measuring diaphragm. The pressure transmitter consists of a capacitor formed by the measuring diaphragm and the electrodes on both sides of the insulating sheet. When the two sides of the pressure are inconsistent, resulting in displacement of the measuring diaphragm, the displacement is proportional to the pressure difference, so the two sides of the capacity will not be equal, through the oscillation and demodulation links, converted into a signal proportional to the pressure.

　Pressure transmitter main advantages