Pressure transmitter of Shanghai automation is the most commonly used sensor in industrial practice. It is widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military, petrochemical, oil well, power, ships, machine tools, pipelines and many other industries.

There are two types of pressure transmitters: electric and pneumatic. The unified output signal of electric type is 0~10mA, 4~20mA or 1~5V DC electrical signal. The unified output signal of pneumatic type is the gas pressure of 20~100Pa.

According to different conversion principles, pressure transmitters can be divided into force (torque) balanced type, capacitive type, inductive type, strain type and frequency type. The following is a brief introduction to the principle, structure, use, maintenance and calibration of several pressure (differential pressure) transmitters.