Pressure Switches
Pressure Switches
Pressure switches are electromechanical or electronic devices that monitor fluid or gas pressure and open or close an electrical circuit when pressure reaches a defined setpoint. They serve as fundamental control and safety components in automated systems, triggering alarms, initiating shutdowns, or activating downstream equipment without the need for continuous manual supervision.
Found across HVAC systems, hydraulic and pneumatic circuits, water treatment plants, chemical processing, and oil and gas installations, pressure switches protect equipment and personnel from overpressure or vacuum conditions. Manufacturers such as Dwyer Instruments, Honeywell, and Gems Sensors produce models suited to low-differential HVAC service through to high-pressure industrial and safety-critical applications.
Typical Applications
- Automated shutdown protection in hydraulic power units and pneumatic systems
- Alarm triggering in building HVAC and chiller systems
- Pressure monitoring in oil and gas pipelines and compressor stations
- Safety interlock circuits in industrial process equipment
- Differential pressure detection for filter status and flow indication
Popular Brands
Dwyer Instruments is widely specified for HVAC and low-pressure applications. Honeywell and Gems Sensors cover a broad range of industrial and high-pressure duties. WIKA and Ashcroft offer precision-grade switches for process instrumentation and safety service.
