40 PSI Supervisory Pressure Switch for Dry Pipe Fire Sprinkler Systems PS-401

Professional-grade supervisory pressure switch engineered for dry pipe fire sprinkler systems. The PS-401 maintains continuous monitoring at 40 PSI setpoint, detecting pressure loss or system deviation that signals potential leaks, blockages, or valve failures before they compromise sprinkler performance.

Features low-pressure sensitivity with snap-action switch mechanism and SPDT contact configuration for reliable alarm transmission to building management systems or fire panels. Rated for indoor installation in mechanical rooms and equipment closets where dry pipe systems are housed.

UL-listed and compliant with NFPA 13 standards for fire protection installations. Stainless steel wetted components resist corrosion in pressurized environments. Standard 1/4" NPT port connection integrates directly into dry pipe supply lines without additional adapters.

Essential maintenance component for facilities operating dry pipe systems in cold climates, warehouses, or unheated spaces where water freezing risk demands air or nitrogen pressurization.