Pressure controller or Pressure Switch

Pressure switches or pressure controllers are widely used in industry to regulate tank pressure or prevent pressure build-up in pressurized environments. Usually, the pressure switches are activated mechanically, such as pressure gauges with Bourdon or diaphragm mechanisms, and the jumper at the set point or setting of a relay, and acts as an On and Off controller with its contact command at the output.

In digital and electronic models, instead of a board or aperture, a strain gauge is used, and in the output, a transistor is usually used as a PNP or NPN. In more advanced models, they also have an output of 4 to 20 mA and an indicator. The following should be considered when choosing a pressure switch

1. The number of outputs is usually between one and two
2. Connection size or pressure port
3. Having a dead band or fixed output
4. Suffering and setting point
5. Maximum pressure tolerable pressure controller
6. Can be used in explosive environments and high pressure IP switches
7. Pressure bearing point
8. Digital or analog pressure controller
9. Accuracy and repeatability of the pressure controller