Leak Detection Sensor Milesight WS303-868M — Mini LoRaWAN water leak detector

The Milesight WS303-868M Mini LoRaWAN water leak detector is a compact sensor designed to detect water presence and leakage in confined or hard-to-reach spaces. Intended for integration with LoRaWAN networks, the device transmits leak events and moisture status to a central gateway, enabling remote monitoring without frequent on-site checks. Its small footprint makes it suitable for basements, utility rooms, server cabinets and industrial areas where early detection of water can prevent equipment damage and operational downtime.

Advantages

The WS303-868M offers low-power operation and wireless long-range communication via LoRaWAN, providing extended battery life and reduced maintenance. Its compact design allows installation in narrow gaps and constrained environments. The sensor delivers reliable binary leak detection and periodic status updates to support automated alerting and integration with monitoring systems. Simple mounting options and compatibility with standard LoRaWAN infrastructure make it convenient to deploy at multiple locations.

Suitable for

• Basements and crawl spaces where moisture accumulation is a concern
• Utility rooms and boiler rooms near water pipes and valves
• Server rooms and network cabinets to protect electronic equipment
• Industrial facilities and warehouses with water-sensitive processes or inventory

Key specifications

• Wireless protocol: LoRaWAN (868 MHz band)
• Detection type: contact-based water/leak detection and moisture presence
• Form factor: compact, low-profile enclosure for tight spaces
• Power: battery-powered with low-power design for prolonged operation
• Communications: periodic telemetry and event-driven alarm transmission
• Operating environment: indoor use in areas exposed to potential leakage

How to use

Place the WS303-868M sensor at floor level or in the area where water ingress is likely to occur, ensuring the sensing contact points are positioned to detect liquid reach. Configure the device on a LoRaWAN network via the network server and assign the appropriate application settings for alarm thresholds and reporting intervals. After commissioning, monitor incoming telemetry and set up automated notifications or integrations with building management and monitoring platforms to receive timely alerts on leak events.

Usage recommendations

Install the detector on a stable, level surface and avoid locations with constant splashing that could cause false positives. Test the sensor after setup to confirm communication with the LoRaWAN gateway and adjust reporting intervals to balance timely alerts with battery life. For critical assets, consider using multiple sensors to cover high-risk zones and include sensor status checks in routine maintenance plans.