{"product_id":"mcdonnell-miller-114763-fs5-d-3-4-3-4-flow-switch-with-2-spdt-switches","title":"McDonnell \u0026 Miller 114763 FS5-D-3\/4 3\/4\" Flow Switch with 2 SPDT Switches","description":"\u003cp\u003eThis high-performance liquid flow switch is designed to monitor flow or no-flow conditions in pipes by utilizing a paddle-actuated mechanism. The \u003cstrong\u003eMcDonnell \u0026amp; Miller 114763\u003c\/strong\u003e, also known by the model \u003cstrong\u003eFS5-D-3\/4\u003c\/strong\u003e, is engineered for industrial and commercial hydronic applications where dependable signaling is required for pumps, chillers, or cooling systems.\u003c\/p\u003e\u003cp\u003eThe unit operates by inserting a paddle into the pipe stream, which moves as liquid flow pushes against it. This movement activates internal micro-switches, providing an electrical signal change. With its dual SPDT switch configuration, this device allows for simultaneous control of multiple circuits or redundant safety monitoring, ensuring your system responds accurately to changes in flow velocity.\u003c\/p\u003e\u003ch4\u003eKey System Performance Baselines:\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSwitch Configuration:\u003c\/strong\u003e Includes two SPDT switches for versatile circuit control.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnection Size:\u003c\/strong\u003e Standard 3\/4-inch NPT pipe connection for seamless integration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReliability:\u003c\/strong\u003e Engineered for consistent, long-term operation in demanding fluid environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e⚠️ \u003cstrong\u003eApplication Profile:\u003c\/strong\u003e Ideal for use in commercial HVAC, water treatment, booster pump systems, and industrial processing lines requiring precise flow detection and interlock protection.\u003c\/p\u003e","brand":"McDonnell \u0026 Miller","offers":[{"title":"Default Title","offer_id":43123966672990,"sku":"114763","price":359.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0663\/7151\/8558\/files\/114763_image_8cb7d045-0777-49cf-8c0d-b34d2bd3fd8d.png?v=1786027293","url":"https:\/\/nationalboilersupply.com\/products\/mcdonnell-miller-114763-fs5-d-3-4-3-4-flow-switch-with-2-spdt-switches","provider":"National Boiler Supply","version":"1.0","type":"link"}