A pressure switch is a device designed to monitor and control pressure levels within a system. It operates by opening or closing an electrical circuit in response to changes in pressure, thereby enabling or disabling equipment based on predetermined pressure thresholds.
Categories of Pressure SwitchPressure switches are primarily classified into two categories:
- Pneumatic
- Hydraulic switches
Pneumatic switches function based on air or vapor pressure, while hydraulic switches rely on liquid pressure. The quest to measure pressure has long been a fundamental aspect of both engineering and science.
These switches can either close or open an electrical circuit in response to changes in pressure. Normally open pressure switches are commonly found in gas furnaces and certain humidifiers. They are typically employed as safety devices, such as drain monitors and refrigerant pressure monitors. Additionally, gas or propane furnaces are often equipped with draft induction motors to enhance their efficiency.
