The Milesight WS303 Mini Leak Detection Sensor monitors water leaks with precision, detecting conductive liquids at just 0.5mm. Weighing only 36 grams and with a thickness less than a coin, it installs easily using the included 3M adhesive. This makes it suitable for various applications such as basements, server rooms, and restrooms.

The sensor runs on a replaceable CR2450 590 mAh battery, offering over five years of maintenance-free use. When a leak is detected, the built-in 85 dB alarm sounds immediately for local notification. Its long-range LoRaWAN connectivity, with a sensitivity of -137 dBm, ensures reliable communication with your gateway, even in challenging locations like underground spaces.

The WS303 uses Milesight's D2D protocol for direct communication with motorised valves, stopping the water supply instantly to prevent flooding. Housed in a durable IP67-rated ABS+PC enclosure, it is protected from immersion and harsh industrial conditions. The sensor is compatible with any standard LoRaWAN gateway and the Milesight IoT Cloud platform, making it adaptable for both single homes and large-scale deployments managed from a single interface.

Key specifications include NFC for tool-free setup via a mobile app and a compact design measuring 63×63×14 mm. The Milesight WS303 Mini Leak Detection Sensor provides reliable protection against water damage.