Working principle of pressure transmitter

The electrical component for sensing pressure in a pressure transmitter is generally a resistance strain gauge, which is a sensitive device that converts the pressure on the measured object into an electrical signal. The most commonly used types of resistance strain gauges are metal resistance strain gauges and semiconductor strain gauges. There are two types of metal resistance strain gauges: wire shaped strain gauges and metal foil shaped strain gauges. Usually, strain gauges are tightly bonded to a matrix that generates mechanical strain through a special adhesive. When the matrix undergoes stress changes under stress, the resistance strain gauge also undergoes deformation, causing a change in the resistance value of the strain gauge and a change in the voltage applied to the resistance.