Switches & Valves

Process switches and valves are control and detection devices used in industrial systems to monitor and regulate pressure, flow, and liquid level. Switches generate discrete electrical signals when a measured variable crosses a set threshold, triggering alarms, shutdowns, or control actions in automated systems. Valves regulate or shut off fluid flow in response to process conditions or control commands, forming critical elements of process safety and regulation circuits.

These components are fundamental building blocks of automated process control. They provide reliable on/off detection without continuous analog output, making them well suited for safety interlocks, alarm systems, and simple automation loops across a wide range of industrial and commercial settings.

Typical Applications

Pressure switch protection for pumps, compressors, and hydraulic systems
Flow switch monitoring for cooling circuits and liquid transfer lines
Float switches for tank level control and overflow protection
HVAC systems: duct airflow proving and fan status confirmation
Industrial process safety interlocks and emergency shutdown systems

Popular Brands

Dwyer Instruments is a leading manufacturer of process switches and controls, offering a comprehensive range of pressure, flow, and level switches for industrial and commercial applications. Their products are widely deployed in HVAC, process control, OEM machinery, and utility systems.