A pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission. It can convert the physical pressure parameters of gases, liquids, etc. sensed by pressure sensors into standard electrical signals (such as 4-20mADC, etc.) to supply secondary instruments such as indicator alarms, recorders, regulators, etc. for measurement, indication, and process adjustment.

Working principle of pressure transmitter

When pressure is directly applied to the surface of the measuring diaphragm, causing slight deformation, the high-precision circuit on the measuring diaphragm converts this slight deformation into a highly linear voltage signal proportional to the pressure and the excitation voltage. Then, a chip is used to convert this voltage signal into an industrial standard 4-20mA current signal or 1-5V voltage signal.