Milesight WS303 | Mini LoRaWAN Water Leakage Detection Sensor

The Milesight WS303 is a "tiny but mighty" LoRaWAN Leak Detection Sensor engineered for high-density smart building and office deployments. Designed to detect the presence of conductive liquids as soon as levels reach 0.5mm, it provides an essential early-warning system to prevent costly water damage. The device features a built-in buzzer for real-time local alarms, ensuring on-site personnel are notified immediately while data is simultaneously sent to the cloud. With its IP67 waterproof rating and support for the Milesight D2D protocol, the WS303 can communicate directly with valves or sirens in under a second, offering a fail-safe local automation layer that operates independently of network connectivity.

Real-Time Protection & Low Latency

Milesight D2D Communication Enables the WS303 to act as a D2D controller, triggering Milesight agents like smart solenoids to shut off water lines instantly upon leak detection. Rugged Miniaturized Design Housed in an IP67 enclosure that is UV-resistant and flame-retardant, making it durable enough for harsh industrial environments despite its small size.

Smart Infrastructure Scenarios

• Smart Offices: Place under sinks, water dispensers, or A/C units for discreet, wire-free leak monitoring. • IT & Data Centers: Monitor server room floors for condensation or cooling system pipe failures. • Hospitality: Protect hotel guest rooms and communal laundries with integrated local buzzer alerts.

What is in the Box?

• 1 x Milesight WS303 Mini Leak Sensor • 1 x 590mAh CR2450 Lithium Battery • 1 x 3M Double-Sided Adhesive Tape • 1 x Quick Start Guide

Product Certifications

CE FCC IP67 RoHS