{"product_id":"waterproof-magnetic-door-sensor-rs485-modbus-rtu-ip68","title":"Waterproof RS485 Modbus RTU Magnetic Door Sensor – IP68 Wired","description":"\n\u003ch2\u003eLIHTNE Waterproof Magnetic Door Contact Sensor with RS485 Modbus RTU\u003c\/h2\u003e\n\u003cp\u003eMonitor door and window open\/close status with precision using the \u003cstrong\u003eLIHTNE IP68 Waterproof Magnetic Door Sensor\u003c\/strong\u003e. Engineered for industrial, commercial, and demanding outdoor environments, this wired sensor communicates over the RS485 interface using the \u003cstrong\u003eModbus RTU protocol\u003c\/strong\u003e — making it ideal for integration into building automation systems, SCADA setups, access control panels, and smart monitoring networks.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRS485 Interface \u0026amp; Modbus RTU Protocol\u003c\/strong\u003e — Seamlessly integrates with industrial control systems; supports device addresses 1–253 for multi-device bus deployments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIP68 Waterproof Rating\u003c\/strong\u003e — Sealed with injected epoxy resin and silicone for complete protection against dust and sustained water immersion; safe for outdoor and wet-area installation.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Sensing Range\u003c\/strong\u003e — Induction distance of 20 to 50 mm for reliable detection even with slight door\/frame misalignment.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLong Service Life\u003c\/strong\u003e — Rated for \u003cstrong\u003e1,000,000 switch operations\u003c\/strong\u003e, delivering years of dependable performance in high-cycle environments.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide Operating Temperature\u003c\/strong\u003e — Functions reliably from \u003cstrong\u003e-20°C to +80°C\u003c\/strong\u003e, with humidity tolerance of 20–95% RH — suited for extreme climates and industrial conditions.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFlame-Retardant PC Plastic Shell\u003c\/strong\u003e — Housing constructed from UL94 V-1 rated polycarbonate for fire safety compliance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWired AWR Cable\u003c\/strong\u003e — Comes with AWR 5×0.3 cable specification for robust, interference-resistant signal transmission.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eRS485\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eProtocol\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eModbus RTU\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDevice Address Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1–253\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eInduction Distance\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e20–50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eSwitch Life\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e1,000,000 operations\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e-20°C to +80°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eHumidity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e20–95% RH\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eStorage Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e-40°C to +65°C\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eWaterproof Rating\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eIP68 (epoxy resin \u0026amp; silicone sealed)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eShell Material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003ePC Plastic, Flame Retardant V-1\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCable\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eAWR 5×0.3\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eA: 48 mm \/ B: 80×65×12×12 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eMade in China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eIdeal Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIndustrial door and gate access monitoring\u003c\/li\u003e\n  \u003cli\u003eBuilding management and automation systems (BMS\/BAS)\u003c\/li\u003e\n  \u003cli\u003eSmart home and commercial security integration\u003c\/li\u003e\n  \u003cli\u003eOutdoor enclosures, utility cabinets, and server room doors\u003c\/li\u003e\n  \u003cli\u003eSCADA and PLC-based control environments\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eLearn More About Electrical Safety Standards\u003c\/h3\u003e\n\u003cp\u003eFor guidance on electrical safety practices and sensor installation standards, visit the \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resource\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What is the RS485 Modbus RTU protocol and why does it matter for door sensors?\u003c\/h4\u003e\n\u003cp\u003eA: RS485 is a robust industrial communication standard that allows multiple devices to share a single cable run over long distances. Modbus RTU is the most widely used protocol over RS485, enabling this magnetic door sensor to be read by PLCs, HMIs, SCADA systems, and other industrial controllers. This makes the LIHTNE sensor an excellent choice for professional building automation and security monitoring setups.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How many sensors can I connect on a single RS485 bus?\u003c\/h4\u003e\n\u003cp\u003eA: The sensor supports device addresses from 1 to 253, meaning you can connect up to 253 individual sensors on one RS485 network bus — greatly reducing wiring complexity in large installations such as warehouses, data centers, or multi-door commercial buildings.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this door sensor truly waterproof for outdoor use?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. The sensor carries an \u003cstrong\u003eIP68 waterproof rating\u003c\/strong\u003e, achieved through injection of epoxy resin and silicone sealing around the cable entry and housing. IP68 is the highest standard ingress protection rating, meaning the sensor can withstand continuous submersion in water — making it fully suitable for outdoor doors, gates, and exposed industrial environments.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the maximum sensing distance between the magnet and sensor body?\u003c\/h4\u003e\n\u003cp\u003eA: The induction distance is \u003cstrong\u003e20 to 50 mm\u003c\/strong\u003e, giving you flexibility during installation and accommodating slight misalignment between the sensor mounted on the door frame and the magnet on the door itself.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is any special wiring required for installation?\u003c\/h4\u003e\n\u003cp\u003eA: The sensor uses an AWR 5×0.3 cable and connects via standard RS485 two-wire (A\/B) differential signaling. It works with any RS485-compatible controller or data acquisition system running Modbus RTU. No special proprietary hardware is needed.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What is the RS485 Modbus RTU protocol and why does it matter for door sensors?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"RS485 is a robust industrial communication standard that allows multiple devices to share a single cable run over long distances. Modbus RTU is the most widely used protocol over RS485, enabling this magnetic door sensor to be read by PLCs, HMIs, SCADA systems, and other industrial controllers. This makes the LIHTNE sensor an excellent choice for professional building automation and security monitoring setups.\"}}, {\"@type\": \"Question\", \"name\": \"How many sensors can I connect on a single RS485 bus?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The sensor supports device addresses from 1 to 253, meaning you can connect up to 253 individual sensors on one RS485 network bus — greatly reducing wiring complexity in large installations such as warehouses, data centers, or multi-door commercial buildings.\"}}, {\"@type\": \"Question\", \"name\": \"Is this door sensor truly waterproof for outdoor use?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. The sensor carries an IP68 waterproof rating, achieved through injection of epoxy resin and silicone sealing around the cable entry and housing. 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