Basic pressure transmitter is introduced

Pressure transmitter is the most common industrial practice, a sensor, its widely used in various industrial control environment, involved in water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemical, oil, electric power, ships, machine tools, pipe, and many other industries. The following will introduce some common principle and application of pressure transmitter, pressure transmitter is used to measure liquid, gas or liquid level, density and pressure of steam, and then the pressure signal into 4 ~ 20 ma DC signal output. Pressure transmitter is mainly capacitance pressure transmitter and diffusion silicon pressure transmitter, ceramic pressure transmitter, strain type pressure transmitter, etc. Pressure transmitter according to the pressure range can be divided into general pressure transmitter ( 0. 001MPa～35MPa） And differential pressure transmitter ( 0 to 1. 5 kpa) Three kinds of negative pressure transmitter. Pressure transmitter the pressure signals to the main function of electronic devices, on the computer display pressure, its principle is: the water pressure the pressure mechanical signal into a current ( 4 - 20mA） Such electronic voltage or current signal of pressure and a linear relationship with the size, is usually proportional relationship. So the transmitter output voltage or current with the pressure increases in a pressure and the relation between the voltage or current pressure transmitter of the two kinds of measured medium pressure ventilation with high and low pressure chamber, two low pressure chamber pressure by atmospheric pressure or vacuum, role in & amp; delta; Yuan, The sensitive element) On isolation on both sides of the diaphragm, the spacer and components on both sides of the filling liquid to measure the diaphragm. Pressure transmitter is by measuring diaphragm and on both sides of the insulation on the electrodes of a capacitor. When we have different pressure on both sides, to cause measuring diaphragm displacement, the displacement and stress is directly proportional to the difference, so both sides capacitance range, through the link of oscillation and demodulation.