Pressure transmitter is a mechanical device that converts the expansion force of a liquid or gas sample into an electrical output. The device converts the pressure into an electrical signal by means of a transducer. This type of sensor, also known as a pressure transducer, usually consists of a pressure sensitive surface area made of steel, silicon or other materials, depending on the composition of the analyte. Behind these surfaces are electronic components capable of converting the force applied to the pressure sensor by the sample into an electrical signal.
Pressure is typically measured in terms of force per unit surface area and is expressed as the value required to stop the expansion of a liquid, gas or vapor.
Pressure measurement
Pressure transmitters can measure absolute, gauge or differential pressures.
Absolute Pressure
Absolute pressure is the perfect vacuum considered to be 0 psi! We refer to vacuum pressure as 0 psi (a). Atmospheric pressure is typically about 14.7 psi (a).
Gauge Pressure
The most common pressure measurement is gauge pressure, which is the total pressure minus the atmospheric pressure.
Atmospheric pressure is 0 psi (g).
Differential Pressure
Differential pressure is the difference in pressure (or differential pressure). Pressure The distributed force acting vertically on a unit area.
