Pressure Transmitter

What is Pressure Transmitter?

A pressure transmitter is a device for pressure measurement of gases or liquids. Pressure is an expression of the force required to stop a fluid from expanding, and is usually stated in terms of force per unit area. A pressure sensor usually acts as a transducer; it generates a signal as a function of the pressure imposed.

Working Principles

Differential Pressure

The differential pressure transmitter includes two functional units: Main unit and Auxiliary Unit. The main unit includes a sensor and process connection. The completely welded sensor module is a twin-chamber system with an integral overload diaphragm, an absolute pressure sensor, a temperature sensor and the silicon differential pressure sensor. The absolute pressure sensor, which is only exposed to the pressure at the high pressure side, acts as a reference value to compensate for the static pressure. The temperature sensor as a temperature compensated reference value to compensate for the temperature drift.

Gauge Pressure 

The gauge pressure transmitter includes two functional units: Main unit and Auxiliary Unit. The main unit includes gauge/temperature sensors and process connection. The low pressure span completely welded sensor module is a twin-chamber system with an integral overload diaphragm, and a silicon pressure sensor. The temperature sensor as a temperature compensated reference value to compensate for the temperature drift.