SOR 4NN-K5-N4-B1A-X Pressure Switch

SOR, Inc.’s 4NN-K5-N4-B1A-X pressure switch is a rugged industrial control device designed to sense and respond to pneumatic and hydraulic pressure. It provides an adjustable setpoint from 3 to 50 psi with an over-range capability of 750 psi, enabling reliable on/off control in process and safety interlocks. The switch uses a 1/4" NPT(F) pressure port and comes in a durable aluminum B1A housing rated for NEMA 4X/IP65 environments, making it suitable for damp, dusty, or washdown‑friendly areas. The -X variant belongs to the 4NN family and maintains the same core switching performance while fitting compact installations common in turbine spare parts and industrial facilities. Typical applications include activating a secondary valve or pump once the process pressure crosses the setpoint, providing a fail-safe signal in automated control schemes, and serving as a simple pressure limit switch in pneumatic systems.