System Sensor WFD30-2 Water Flow Detector

The System Sensor WFD30-2 Water Flow Detector delivers reliable vane-type water flow sensing for fire sprinkler monitoring in wet-pipe systems. Designed for 3-inch Schedule 10 through 40 steel piping, it activates at 4–10 GPM and transmits alarm signals to fire alarm control panels, with a 450 PSI static pressure rating and a 18 FPS maximum surge. The unit uses dual SPDT contacts and is rated for 10 A at 125/250 VAC or 2.5 A at 24 VDC, and it mounts as a pipe-mounted installation in horizontal or vertical orientation within a NEMA 4 enclosure. Common replacements include System Sensor WFD30, Potter VSR-3, and Reliable VSR-3, and it is typically applied in commercial buildings and industrial facilities for repair, retrofit, expansion, or replacement in wet-pipe fire protection systems.