{"product_id":"system-sensor-wfd40-water-flow-switch-detector","title":"System Sensor WFD40 Water Flow Switch Detector","description":"\u003cdiv\u003e\u003cp\u003eThe System Sensor WFD40 Water Flow Switch Detector is a vane-type sensor used in fire sprinkler monitoring to detect water movement in wet-pipe sprinkler networks. It is designed for 4-inch steel pipe and provides a 4 to 10 GPM activation range with a 450 PSI static pressure rating, and it uses dual SPDT switches rated at 10 A, 1\/2 HP at 125\/250 VAC. This pipe-mounted device can be installed in either a horizontal or vertical orientation and features a NEMA 4 enclosure for durability in challenging environments; it transmits alarm signals to fire alarm control panels, making it a common choice in commercial buildings, industrial facilities, and warehouses where reliable water flow monitoring and alarm activation are required. Common replacements include System Sensor WFD40A, Potter VSR-F, and Reliable VSR-4.\u003c\/p\u003e\u003c\/div\u003e","brand":"System","offers":[{"title":"New","offer_id":46253335216362,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0716\/8039\/3450\/files\/GTG-STOCK-010.png?v=1788727428","url":"https:\/\/gtghardware.com\/products\/system-sensor-wfd40-water-flow-switch-detector","provider":"GTG Hardware","version":"1.0","type":"link"}