pressure switch

 A pressure switch is very important little device that enables the safety and control of many different environments. It functions as a fail-safe device in order to prevent any number of incidents from occurring by either measuring the amount of pressure applied and reacting or simply by providing a way to decrease or increase different types of pressure.

Environments
The pressure switch is utilized in many different types of environments. These include, but are not limited to, utility and chemical plants, machine manufacturing facilities and public buildings.
Application
A pressure switch is typically used in conjunction with some form of liquid, gas, steam or electricity.
Manual
A manual pressure switch is simply like a light switch that a person has to walk up to, to flip on or off.
Automatic
An automatic pressure switches senses when the pressure level is too high or low. It can respond without the need of human aid.
Uses
A pressure switch may open compartments to let out steam or air. It might shut down a machine. Whatever action is established that will prevent human or financial harm for the particular scenario is the function of the pressure switch.