The System Sensor EPS40-1 is a heavy-duty low-pressure supervisory pressure switch engineered specifically for dry pipe fire sprinkler systems, pressure tanks, and automatic water control valve supplies. This professional-grade supervisory pressure switch features a field-adjustable range from 10 to 100 PSI, factory-preset to activate at 30 PSI on decreasing pressure to alert teams of critical system pressure drops. Built with a NEMA 4 rated enclosure, this unit is suitable for both indoor and outdoor installations, providing essential sprinkler system monitoring in demanding environmental conditions. Equipped with a single SPDT relay (Form C), the EPS40-1 ensures reliable signaling to fire alarm control panels. The internal bellows-activated mechanism is supported by a reinforced diaphragm designed to resist high-pressure spikes up to a 250 PSI maximum operating limit. For streamlined field integration, the 1/2" NPT male connection and dual conduit entrances allow for versatile mounting and wiring. The integrated sensitivity adjustment wheel enables precise calibration without the need for specialized tools, ensuring the system air pressure switch meets exact site requirements. Key Benefits: Precision Monitoring: Adjustable 10-100 PSI range allows for fine-tuned supervisory signals in dry pipe and pre-action systems. Rugged Construction: NEMA 4/UL 4x weatherproof housing protects internal components from moisture and dust ingress. Simplified Calibration: Tool-free adjustment wheel facilitates rapid changes to the decreasing pressure trip point. High Compatibility: Standard 1/2" NPT male connection ensures seamless fit with most existing riser and air line configurations. Enhanced Durability: Bellows-activated design with reinforced diaphragm handles system surges without compromising switch accuracy. Common Questions: Can this switch be used for waterflow alarm signaling? No, the EPS40-1 is specifically a supervisory switch for monitoring low-pressure conditions. For waterflow detection in wet pipe systems, the EPS10 series is the appropriate selection. Is this unit rated for outdoor installation? Yes, the NEMA 4 enclosure rating ensures the device is weatherproof and suitable for both interior and exterior applications when installed with proper conduit fittings. How do I adjust the pressure set point? Remove the cover and rotate the main adjustment wheel. Turning it counter-clockwise increases the pressure setting. Always verify the trip point with a calibrated gauge after adjustment. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
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