Milesight WS303-868M – Mini Leakage Sensor with LoRaWAN® and IP67 Protection

The Milesight WS303-868M is a miniature water leakage sensor designed to detect the presence of conductive liquids and send alerts when even a 0.5 mm water level is detected. With its IP67-rated waterproof housing and LoRaWAN® technology, it ensures reliable and long-range communication for preventing water damage and enabling remote alarm notifications.

Thanks to Milesight D2D technology, the WS303 can communicate directly with other Milesight devices without needing a gateway, enabling ultra-low latency responses for real-time prevention. It also features a built-in buzzer for immediate local alerts, and users can receive real-time notifications via the Milesight IoT Cloud or mobile app.

Powered by a 590 mAh CR2450 lithium battery, the WS303 offers a battery life of up to 5.7 years under typical use (one hour of leakage per week at 25°C). The device’s ABS+PC housing is durable, flame-retardant, and well-suited for harsh environments. Installation is quick and easy using 3M adhesive tape or desktop placement.

When connected with a Milesight LoRaWAN® gateway and managed via the Milesight Development Platform, the WS303 provides a complete remote water leak detection solution, ideal for smart homes, commercial buildings, hotels, data centers, and public facilities.