Waterproof Magnetic Door Sensor RS485 Modbus RTU IP68 | LIHTNE
Waterproof Magnetic Door Sensor RS485 Modbus RTU IP68 | LIHTNE
LIHTNE Waterproof Magnetic Door Sensor with RS485 Modbus RTU Interface
Upgrade your security or automation system with the LIHTNE Waterproof Wired Magnetic Door Sensor. Designed for demanding industrial and commercial environments, this IP68-rated detector communicates over the reliable RS485 bus using the Modbus RTU protocol — making it easy to integrate with PLCs, building automation systems, SCADA platforms, and smart home controllers.
Encased in flame-retardant PC plastic and sealed with injected epoxy resin and silicone, this sensor stands up to dust, moisture, and extreme temperatures, whether installed on exterior doors, server room cabinets, warehouse gates, or cold storage units.
Key Features
- IP68 Waterproof Rating — Fully sealed with epoxy resin and silicone injection; suitable for wet and outdoor installations
- RS485 / Modbus RTU Interface — Supports device addresses 1–253 for easy multi-device daisy-chaining on a single bus
- 20–50 mm Induction Distance — Reliable magnetic gap detection for standard door and window frames
- 1,000,000-Cycle Switch Life — Built for long-term, heavy-duty use in high-traffic installations
- Wide Operating Temperature — Functions from -20 °C to +80 °C; suitable for freezers, industrial floors, and outdoor enclosures
- Humidity Tolerance — Operates in 20%–95% RH environments without performance degradation
- Flame-Retardant Shell — PC plastic housing rated UL 94 V-1 for added fire safety compliance
- Compact Dimensions — Sensor body: 48 mm; magnet: 80 × 65 × 12 mm — unobtrusive and easy to mount
- AWR 5×0.3 Cable — Pre-wired with a robust, flexible multi-conductor cable
Technical Specifications
| Interface | RS485 |
| Protocol | Modbus RTU |
| Device Address Range | 1–253 |
| Induction Distance | 20–50 mm |
| Switch Life | 1,000,000 cycles |
| Operating Temperature | -20 °C to +80 °C |
| Operating Humidity | 20%–95% RH |
| Storage Temperature | -40 °C to +65 °C |
| Waterproof Rating | IP68 (epoxy resin + silicone sealed) |
| Shell Material | PC Plastic, Flame Retardant V-1 |
| Cable | AWR 5×0.3 |
| Dimensions | Sensor: 48 mm | Magnet: 80×65×12 mm |
| Country of Origin | Made in Mainland China |
Ideal Applications
- Industrial door and gate monitoring
- Server room and data center access detection
- Cold storage and refrigeration unit monitoring
- Smart building automation systems
- Warehouse and logistics access control
- SCADA and PLC integration projects
Learn More About Industrial Sensor Standards
For guidance on industrial safety and electrical standards relevant to sensors and automation equipment, visit the NIST Manufacturing Standards Resource. For workplace electrical safety best practices, refer to OSHA's Electrical Safety Guidelines.
Frequently Asked Questions
Q: What communication protocol does this magnetic door sensor use?
A: This sensor uses the RS485 interface with Modbus RTU protocol. It supports device addresses from 1 to 253, allowing multiple sensors to be connected on a single RS485 bus — ideal for multi-door monitoring in industrial and commercial automation systems.
Q: Is this door sensor truly waterproof for outdoor installation?
A: Yes. The LIHTNE magnetic door sensor carries an IP68 waterproof rating, achieved through injected epoxy resin and silicone sealing. It is suitable for outdoor, wet, and high-humidity environments, and its operating humidity range extends up to 95% RH.
Q: What is the maximum gap distance the sensor can detect?
A: The sensor reliably detects magnetic separation at an induction distance of 20 to 50 mm, making it compatible with most standard door frames and cabinet installations where a small gap may exist between the sensor and the magnet.
Q: Can this sensor be used in freezer or cold storage environments?
A: Absolutely. With an operating temperature range of -20 °C to +80 °C, this sensor is well-suited for cold storage units, refrigeration rooms, and other low-temperature industrial applications.
Q: What type of cable does the sensor come with?
A: The sensor is pre-wired with an AWR 5×0.3 multi-conductor cable, providing a robust and flexible connection for integration into your RS485 network or control panel.