{"product_id":"simplexgrinnell-2098-9537-air-duct-smoke-detector","title":"SimplexGrinnell 2098-9537 Air Duct Smoke Detector","description":"\u003cdiv\u003e\u003cp\u003eThe SimplexGrinnell 2098-9537 air duct smoke detector is a duct-mounted device for commercial HVAC fire protection systems, designed to detect smoke within ventilation ducts and initiate alarm or equipment shutdown. Weighing 6.45 lb and housed in a flame-retardant enclosure, it uses an air sampling tube to monitor smoke at operating air velocities from 300 to 4000 ft\/min, with installation type specified as duct mounting and compatibility with air handling units and ventilation systems. It is intended for commercial and industrial facilities, including ventilation networks and life-safety installations, and it aligns with NFPA duct smoke detection requirements to support reliable monitoring integrated with building management systems. Common replacements include Simplex 2098-9648, System Sensor D4120, and Simplex 4098-9756, making it suitable for repair, retrofit, expansion, or replacement within existing SimplexGrinnell HVAC fire protection networks.\u003c\/p\u003e\u003c\/div\u003e","brand":"System","offers":[{"title":"Used Surplus - Excellent Condition","offer_id":46253332955370,"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\/simplexgrinnell-2098-9537-air-duct-smoke-detector","provider":"GTG Hardware","version":"1.0","type":"link"}