A properly dimensioned pressure monitoring system is crucial for both operational reliability and energy efficiency. Two key components – pressure switch and pressure transmitter –play different roles. Below, we will walk you through how they work, where they are used, and how to choose the right solution.
What is a pressure switch?
A pressure switch is basically an electrical switch that turns on or off at a preset pressure level. When the thresholdis reached, an internal micro- or macro‐mechanical element (diaphragm, bellows or piezo‐kit) is activated that closes or opens a contact. The function is therefore binary – "on/off" – rather than continuous measurement.
Key Points
Used for safety and control functions (e.g. stop compressor in case of overpressure).
Can be mechanical or electronic; Electronic variants sometimes offer digital display and adjustable hysteresis.
Relatively low cost and easy to install.
Common applications: hydrophores, fire protection systems, refrigeration compressors, hydraulic presses and HVAC systems.
Click to view: What is a pressure sensor/pressure transmitter?
