{"product_id":"system-d4120a-4-wire-photoelectric-duct-smoke-detector","title":"System Sensor D4120A 4-Wire Photoelectric Duct Smoke Detector, 24VDC\/120VAC","description":"\u003cp\u003eThe System Sensor D4120 is a 4-wire duct smoke detector designed to monitor air ducts in HVAC systems for early smoke detection. Ideal for commercial, industrial, and institutional buildings requiring reliable, code-compliant air duct smoke detection.\u003cbr\u003e\u003c\/p\u003e","brand":"Max Mart","offers":[{"title":"Default Title","offer_id":50225935876333,"sku":"ELT-D4120A","price":200.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0696\/7227\/2109\/files\/21_a6e88a58-e27f-4e5b-9c13-b9631ef4fbe3.jpg?v=1783864350","url":"https:\/\/maxmart365.com\/zh\/products\/system-d4120a-4-wire-photoelectric-duct-smoke-detector","provider":"Max Mart","version":"1.0","type":"link"}