Which Pressure Type of the Pressure Sensor is Suitable for Your Application?

When choosing a pressure sensor like our UPB1 pressure transmitter, you need to know the difference between three types of pressure.

The measuring membrane of most pressure sensors deforms under pressure, and it is important to know the value of this deformation. Since the membrane has two sides and another pressure is applied on the second side, the measured deformation is actually the result of the pressure difference between the two sides of the membrane.

Based on this "reference" pressure, three types of pressures and sensors can be considered:

Absolute pressure: In an absolute pressure sensor, the second side of the membrane is in a vacuum state and its deformation corresponds exactly to the measured pressure.

Gauge pressure: In a gauge pressure sensor, the second side of the membrane is subjected to atmospheric pressure, so its deformation corresponds to the difference between the measured pressure and the ambient pressure.

Differential Pressure: A differential pressure sensor has 2 inputs, one on each side of the membrane, so its deformation corresponds to the pressure difference between the 2 inputs.

For more details, please contact Stella Meng.