{"product_id":"liftmaster-small-profile-monitored-edge-with-aluminum-channel-4ft","title":"LiftMaster Small Profile Monitored Edge with Aluminum Channel - 4ft","description":"\u003ch2 data-section-id=\"e7e3g9\" data-start=\"0\" data-end=\"85\"\u003eLiftMaster S504AL Small Profile Monitored Safety Edge with Aluminum Channel – 4 Ft\u003c\/h2\u003e\n\u003cp data-start=\"87\" data-end=\"518\"\u003eThe LiftMaster S504AL Small Profile Monitored Safety Edge is a high-quality monitored entrapment protection device designed for automatic gates, commercial doors, and access control systems. Built for reliability, safety, and UL325 compliance, this 4-foot monitored resistive edge helps protect people, vehicles, and property by detecting obstructions and immediately signaling the gate or door operator to stop and reverse motion.\u003c\/p\u003e\n\u003cp data-start=\"520\" data-end=\"885\"\u003eFeaturing a compact small-profile design, the LiftMaster S504AL is ideal for installations where space is limited while still providing dependable obstacle detection for residential, commercial, industrial, and high-traffic gate systems. The included aluminum mounting channel ensures secure installation and long-term durability in indoor and outdoor environments.\u003c\/p\u003e\n\u003cp data-start=\"887\" data-end=\"1233\"\u003eThis monitored safety edge is commonly used with LiftMaster gate operators and monitored safety systems requiring UL325-compliant entrapment protection. Its weather-resistant construction and dependable sensing technology make it a trusted solution for professional gate installers, facility managers, contractors, and access control specialists.\u003c\/p\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"1235\" data-end=\"1251\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"1252\" data-end=\"1712\"\u003e\n\u003cli data-section-id=\"1j8rw2y\" data-start=\"1252\" data-end=\"1294\"\u003eGenuine LiftMaster monitored safety edge\u003c\/li\u003e\n\u003cli data-section-id=\"v9ltg5\" data-start=\"1295\" data-end=\"1348\"\u003eSmall profile design for low-clearance applications\u003c\/li\u003e\n\u003cli data-section-id=\"vy9nrq\" data-start=\"1349\" data-end=\"1390\"\u003e4-foot monitored resistive sensing edge\u003c\/li\u003e\n\u003cli data-section-id=\"zb8yy2\" data-start=\"1391\" data-end=\"1435\"\u003eIncludes durable aluminum mounting channel\u003c\/li\u003e\n\u003cli data-section-id=\"1xth69u\" data-start=\"1436\" data-end=\"1485\"\u003eDetects obstructions and triggers gate reversal\u003c\/li\u003e\n\u003cli data-section-id=\"c3i8qt\" data-start=\"1486\" data-end=\"1531\"\u003eDesigned for UL325-compliant safety systems\u003c\/li\u003e\n\u003cli data-section-id=\"2coyz5\" data-start=\"1532\" data-end=\"1580\"\u003eWeather-resistant construction for outdoor use\u003c\/li\u003e\n\u003cli data-section-id=\"1ea7xrr\" data-start=\"1581\" data-end=\"1634\"\u003eIdeal for residential and commercial gate operators\u003c\/li\u003e\n\u003cli data-section-id=\"1ljw1vs\" data-start=\"1635\" data-end=\"1665\"\u003eFast and secure installation\u003c\/li\u003e\n\u003cli data-section-id=\"wylxrw\" data-start=\"1666\" data-end=\"1712\"\u003eCompatible with monitored LiftMaster systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"xx0hya\" data-start=\"1714\" data-end=\"1737\"\u003eCommon Applications\u003c\/h3\u003e\n\u003cul data-start=\"1738\" data-end=\"1941\"\u003e\n\u003cli data-section-id=\"5vxe5f\" data-start=\"1738\" data-end=\"1763\"\u003eAutomatic sliding gates\u003c\/li\u003e\n\u003cli data-section-id=\"1s3oqko\" data-start=\"1764\" data-end=\"1786\"\u003eSwing gate operators\u003c\/li\u003e\n\u003cli data-section-id=\"1fg12k5\" data-start=\"1787\" data-end=\"1812\"\u003eCommercial gate systems\u003c\/li\u003e\n\u003cli data-section-id=\"12k8570\" data-start=\"1813\" data-end=\"1840\"\u003eIndustrial access control\u003c\/li\u003e\n\u003cli data-section-id=\"1tka7v4\" data-start=\"1841\" data-end=\"1860\"\u003eSecurity barriers\u003c\/li\u003e\n\u003cli data-section-id=\"1qnnf2g\" data-start=\"1861\" data-end=\"1878\"\u003eWarehouse doors\u003c\/li\u003e\n\u003cli data-section-id=\"wbncgx\" data-start=\"1879\" data-end=\"1913\"\u003eHOA and apartment gate entrances\u003c\/li\u003e\n\u003cli data-section-id=\"19xp9hz\" data-start=\"1914\" data-end=\"1941\"\u003eCommercial overhead doors\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"w2eo3m\" data-start=\"1943\" data-end=\"1962\"\u003eCompatible With\u003c\/h3\u003e\n\u003cul data-start=\"1963\" data-end=\"2155\"\u003e\n\u003cli data-section-id=\"83bbii\" data-start=\"1963\" data-end=\"2000\"\u003eLiftMaster monitored gate operators\u003c\/li\u003e\n\u003cli data-section-id=\"mp41fo\" data-start=\"2001\" data-end=\"2034\"\u003eLiftMaster UL325 safety systems\u003c\/li\u003e\n\u003cli data-section-id=\"10qg6k1\" data-start=\"2035\" data-end=\"2070\"\u003eLiftMaster monitored input boards\u003c\/li\u003e\n\u003cli data-section-id=\"13otxj9\" data-start=\"2071\" data-end=\"2102\"\u003eLiftMaster wireless edge kits\u003c\/li\u003e\n\u003cli data-section-id=\"effwte\" data-start=\"2103\" data-end=\"2155\"\u003eCommercial monitored entrapment protection systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"nucr17\" data-start=\"2157\" data-end=\"2185\"\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cul data-start=\"2186\" data-end=\"2477\"\u003e\n\u003cli data-section-id=\"ywm3wy\" data-start=\"2186\" data-end=\"2201\"\u003eModel: S504AL\u003c\/li\u003e\n\u003cli data-section-id=\"jlbi4o\" data-start=\"2202\" data-end=\"2218\"\u003eLength: 4 Feet\u003c\/li\u003e\n\u003cli data-section-id=\"1klk154\" data-start=\"2219\" data-end=\"2258\"\u003eType: Monitored Resistive Safety Edge\u003c\/li\u003e\n\u003cli data-section-id=\"ts1nyl\" data-start=\"2259\" data-end=\"2283\"\u003eProfile: Small Profile\u003c\/li\u003e\n\u003cli data-section-id=\"1qzho8e\" data-start=\"2284\" data-end=\"2321\"\u003eMounting: Aluminum channel included\u003c\/li\u003e\n\u003cli data-section-id=\"1ivaqbf\" data-start=\"2322\" data-end=\"2379\"\u003eApplication: Gate operators and commercial door systems\u003c\/li\u003e\n\u003cli data-section-id=\"ljok7m\" data-start=\"2380\" data-end=\"2427\"\u003eInstallation: Vertical or horizontal mounting\u003c\/li\u003e\n\u003cli data-section-id=\"1ua2fwf\" data-start=\"2428\" data-end=\"2477\"\u003eCompliance: UL325 monitored safety requirements\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1qc7kle\" data-start=\"2479\" data-end=\"2518\"\u003eImportant Compatibility Information\u003c\/h3\u003e\n\u003cp data-start=\"2519\" data-end=\"2832\"\u003eThe LiftMaster S504AL is designed for monitored safety systems and may require a compatible LiftMaster monitored interface, wireless edge transmitter, or monitored gate operator depending on the installation setup. It is not intended for non-monitored gate operators unless compatible monitoring hardware is used.\u003c\/p\u003e\n\u003ch3 data-section-id=\"2cn7aw\" data-start=\"2834\" data-end=\"2857\"\u003eCommon Search Terms\u003c\/h3\u003e\n\u003cp data-start=\"2858\" data-end=\"3199\"\u003eLiftMaster S504AL, LiftMaster monitored safety edge, LiftMaster 4ft safety edge, LiftMaster small profile edge, monitored gate edge, UL325 safety edge, LiftMaster gate sensor edge, automatic gate safety edge, LiftMaster entrapment protection, LiftMaster aluminum channel edge, commercial gate safety edge, LiftMaster gate operator accessory.\u003c\/p\u003e\n\u003ch3 data-section-id=\"5t7ttf\" data-start=\"3201\" data-end=\"3221\"\u003ePackage Includes\u003c\/h3\u003e\n\u003cul data-start=\"3222\" data-end=\"3339\"\u003e\n\u003cli data-section-id=\"5b3466\" data-start=\"3222\" data-end=\"3263\"\u003eLiftMaster S504AL monitored safety edge\u003c\/li\u003e\n\u003cli data-section-id=\"1r5aqvg\" data-start=\"3264\" data-end=\"3291\"\u003eAluminum mounting channel\u003c\/li\u003e\n\u003cli data-section-id=\"145jq9n\" data-start=\"3292\" data-end=\"3311\"\u003eMounting hardware\u003c\/li\u003e\n\u003cli data-section-id=\"wb4lof\" data-start=\"3312\" data-end=\"3339\"\u003eInstallation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"3341\" data-end=\"3547\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eThe LiftMaster S504AL Small Profile Monitored Safety Edge is an ideal replacement or upgrade solution for maintaining safe, compliant, and reliable operation of automatic gate and commercial access systems.\u003c\/p\u003e","brand":"Service Spring Corp","offers":[{"title":"Default Title","offer_id":50684219293982,"sku":"S504AL","price":153.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0978\/2781\/5710\/files\/imagegen_b6bb12bf-a90d-4890-9b52-b07148fe0ecf.jpg?v=1772790693","url":"https:\/\/garage-doorparts.com\/products\/liftmaster-small-profile-monitored-edge-with-aluminum-channel-4ft","provider":"garage-doorparts.com","version":"1.0","type":"link"}