{"product_id":"wfd25n-system-sensor-2-12-vane-type-water-flow-switch-nema-4","title":"WFD25N | System Sensor 2-1\/2″ Vane-Type Water Flow Switch NEMA 4","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"19\" data-end=\"322\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe System Sensor WFD25N is a vane-type water flow switch designed for 2-1\/2 inch steel pipe in wet fire sprinkler systems. It detects water movement within the piping network and provides electrical signaling for fire alarm activation. The unit features a NEMA 4 enclosure for indoor and outdoor installations and supports pressure ratings up to 450 PSI.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"20\" data-end=\"417\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"20\" data-end=\"417\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable height=\"408\" style=\"width: 82.0468%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eSystem Sensor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eFire Safety\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eWFD25N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eWater Flow Switch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003ePipe Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e2-1\/2 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eCompatible Pipe Schedule\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eSchedule 7–40 Steel Pipe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eDetection Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eVane-Type Mechanical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eActivation Flow Rate\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e4–10 GPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003ePressure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e450 PSI\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eContact Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eTwo SPDT (Form C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eContact Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e10 A @ 125\/250 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eEnclosure Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eNEMA 4\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e32°F to 150°F (0°C to 66°C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eConduit Openings\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003eTwo 1\/2″ Conduit Entrances\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 49.5622%;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 50.0876%;\"\u003e2.6 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About\u003cmeta charset=\"utf-8\"\u003e \u003cmeta charset=\"utf-8\"\u003e \u003cspan data-sheets-root=\"1\"\u003eWFD25N\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp data-start=\"374\" data-end=\"870\"\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe WFD25N is a mechanical vane-type waterflow detector developed for installation on Schedule 7 through 40 steel pipe. It operates by inserting a vane into the pipe, which activates internal switch contacts when water flow reaches a specified threshold. The device includes a pneumatic retard mechanism adjustable from 0 to 90 seconds to reduce nuisance alarms caused by transient pressure changes. Designed for fire protection systems, it is UL Listed and FM Approved for use in wet-pipe sprinkler applications.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-end=\"828\" data-start=\"372\"\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003eKey Features:\u003c\/strong\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"946\" data-end=\"1562\"\u003e\n\u003cli data-start=\"946\" data-end=\"1029\"\u003e\n\u003cp data-start=\"948\" data-end=\"1029\"\u003e2-1\/2″ Pipe Compatibility: Designed for Schedule 7–40 steel pipe installations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1030\" data-end=\"1105\"\u003e\n\u003cp data-start=\"1032\" data-end=\"1105\"\u003eVane-Type Detection: Mechanical vane senses water flow within the pipe.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1106\" data-end=\"1188\"\u003e\n\u003cp data-start=\"1108\" data-end=\"1188\"\u003eAdjustable Pneumatic Delay: 0–90 second retard mechanism reduces false alarms.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1189\" data-end=\"1259\"\u003e\n\u003cp data-start=\"1191\" data-end=\"1259\"\u003eDual SPDT Contacts: Two Form C contacts rated 10 A at 125\/250 VAC.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1260\" data-end=\"1335\"\u003e\n\u003cp data-start=\"1262\" data-end=\"1335\"\u003eNEMA 4 Enclosure: Weather-resistant housing for indoor and outdoor use.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1336\" data-end=\"1414\"\u003e\n\u003cp data-start=\"1338\" data-end=\"1414\"\u003e450 PSI Pressure Rating: Suitable for high-demand fire protection systems.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1415\" data-end=\"1488\"\u003e\n\u003cp data-start=\"1417\" data-end=\"1488\"\u003eFlexible Mounting: Supports horizontal or vertical pipe installation.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-start=\"1489\" data-end=\"1562\"\u003e\n\u003cp data-start=\"1491\" data-end=\"1562\"\u003eUL and FM Approved: Certified for fire sprinkler system applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1564\" data-end=\"1692\"\u003eThe WFD25N delivers the reliability and precision required for fire sprinkler water flow detection and alarm system integration.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49104824107264,"sku":"WFD25N","price":660.03,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/s-l960_fcdc6760-f8fd-4249-8c76-10c647c7d20c.webp?v=1785533865","url":"https:\/\/alotechparts.com\/products\/wfd25n-system-sensor-2-12-vane-type-water-flow-switch-nema-4","provider":"Alo Tech Solutions","version":"1.0","type":"link"}