{"product_id":"4-inch-vane-type-waterflow-alarm-switch-with-retard-wet-sprinkler-systems-vsr-4","title":"4 Inch Vane Type Waterflow Alarm Switch with Retard, Wet Sprinkler Systems VSR-4","description":"\u003cp\u003eThe VSR-4 is a vane type waterflow alarm switch designed for wet sprinkler systems. This UL Listed, FM Approved, and LPCB Approved device detects water flow and triggers an alarm signal, making it essential for fire suppression system monitoring and compliance. It features two single pole, double throw snap action switches housed in a tamper-resistant die-cast enclosure.\u003c\/p\u003e\n\u003cp\u003eThe VSR-4 activates when flow reaches 10 GPM (38 LPM) or greater downstream of the device. An adjustable, instantly recycling pneumatic retard allows you to set the delay period needed before the alarm triggers, helping reduce false alarms from temporary pressure fluctuations. The switch compartments are isolated for use with dissimilar voltages, and two conduit knockouts support standard 1\/2 inch conduit connections.\u003c\/p\u003e\n\u003cp\u003eUL Listed for schedules 5–40 steel pipe in 2–6 inch sizes, with FM and LPC approval for schedules 10–40 in 2–8 inch sizes. Also suitable for sectional waterflow detection on large systems. The die-cast housing features two tamper-resistant screws requiring a special key, with an optional field-installable cover tamper switch available.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eVane type waterflow switch triggers alarm at 10 GPM (38 LPM) flow rate for automatic system detection\u003c\/li\u003e\n\u003cli\u003eTwo SPDT snap action switches support dissimilar voltages in isolated compartments\u003c\/li\u003e\n\u003cli\u003eAdjustable pneumatic retard with easy-to-read delay knob reduces false alarms from transient pressure changes\u003c\/li\u003e\n\u003cli\u003eUL, CUL, CSFM Listed and FM Approved for steel pipe schedules 5–40 in sizes 2–6 inches\u003c\/li\u003e\n\u003cli\u003eTamper-resistant die-cast housing with optional field-installable cover tamper switch\u003c\/li\u003e\n\u003cli\u003e5-year limited warranty covers defects in materials and workmanship\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Potter Electric Signal, LLC","offers":[{"title":"Default Title","offer_id":68261330878685,"sku":"kaybee-VSR-4","price":322.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0834\/9912\/2909\/files\/VSR-4-1.jpg?v=1792699378","url":"https:\/\/kaybeesecurity.com\/products\/4-inch-vane-type-waterflow-alarm-switch-with-retard-wet-sprinkler-systems-vsr-4","provider":"Kaybee Security","version":"1.0","type":"link"}