Pressure switches are electrical components all about pressure control. They do so by sensing changes in liquid and/or gas pressure and reacting with a preprogrammed response.

Specifically, they open or close when activated at certain pressure points, or actuation points, or in other words, when pressure reaches a predetermined level, whether it be rising or falling, on their input. Usually, the response garnered by a pressure switch is automatic, but sometimes users must open or close the switch using a manual reset button, only after the switch has alerted attendants to the pressure change with an alarm or another signal.

Pressure switches can be found in the home and on space stations, where they provide invaluable flow pressure regulation. They are an asset to a wide range of applications, such as automotive operation, process manufacturing, petrochemical distribution, wastewater cleanup, and the operation of pipelines, panels, pumps, turbines, generators, compressors, off-road equipment, furnaces, blowers, filters, and more.