Milesight WS301 simply enables you to know when someone enters the office/building through door/window or something has been moved. The minimal magnet is placed inside the portable part, while the sensor is inside the fixed part that can be attached on door/window or other objects. With a style of minimalism and compact size, the wire-free WS301 can be easily mounted on the doors, panes, or cabinets, greatly providing real applications for smart homes, smart office or smart factories.
With LoRa technology, one of the most low power consumption technologies, Milesight WS301 can work up to almost 2years with out bothering to replace battery. Compliant with Milesight LoRaWAN® gateway and Milesight IoT Cloud solution, WS301 will surely monitor the real-time open/close status and receive alarms via mobile App.
Main Features
- Suitable for various doors/windows of different materials
- Support mounting tamper detection
- LED for network status, open/close status, tamper and low battery indication
- Ultra-wide-distance transmission up to line of sight of 15 km
- Built-in 1200mAh replaceable battery can work continuously for 5 years
- Equipped with NFC for one touch configuration
- Support Milesight LoRa D2D protocol to enable ultra-low latency and directly control without gateway
- Function well with standard LoRaWAN® gateways and network servers
- Compliant with Milesight IoT Cloud
A Reliable Guardian for Every Door and Window
The WS301 LoRaWAN Magnetic Contact Switch (Door Sensor) can be mounted on any doors or windows to detect an opening or closing event. It adds physical security monitoring to your location by warning of intrusion or unauthorized entry.
Tamper Detection
Alerting administrator to any attempts to dismount the device
Long Battery Life
WS301 LoRaWAN Magnetic Contact Switch provides more than 4 years service life without battery replacement
Easy Installation

Easy to Use
Switching on/off and configuring the device via NFC technology from mobile phone or PC
Minimal Size
Specifications
Wireless Transmission | Technology | LoRaWAN® v1.0.2/v1.0.3/v1.1 |
Frequency | AS923 | |
Tx Power | 16 dBm (868 MHz)/22 dBm (915 MHz)/19 dBm (470 MHz) | |
Sensitivity | -137 dBm @300bps | |
Mode | OTAA/ABP Class A | |
Measurement and Interface | Detection Distance | 10-15 mm |
Button | 1 × Power Button (Internal), 1 × Tampering Button | |
Operation | Configuration | Mobile App (via NFC) or PC software (via USB Type-C) |
Alarms | Open/Close Status, Tamper, Low Battery | |
Physical Characteristics | Power Supply | 1 × 1200 mAh ER14250 Li-SOCl2 battery |
Battery Life | 4~7 years | |
Operating Temperature | -20°C to +60°C | |
Relative Humidity | ≤90% (non-condensing) | |
Ingress Protection | IP30 | |
Dimension | Sensor: 50 × 30 × 17 mm (1.97 × 1.18 × 0.67 in) Magnet: 30 × 17 × 8 mm (1.18 × 0.67 × 0.31 in) | |
Installation | On the flat surfaces with screws or 3M tapes |
Documents
- Milesight WS301 LoRaWAN Magnetic Contact Switch – Complete User Guide
- Milesight WS301 LoRaWAN Magnetic Contact Switch – Datasheet
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