WS303 Mini Leak Detection Sensor CoWork Series

WS303 Mini Leak Detection Sensor – lorawan® Water Leak Alarm with Buzzer & IP67 Protection

The Milesight WS303 is a compact and efficient water leakage detection sensor designed to alert users instantly when conductive liquid is detected. Built with lorawan® and Milesight D2D support, the WS303 can trigger local and remote alarms without needing a gateway—offering ultra-fast response for smart buildings, offices, and homes. The device includes a built-in buzzer, IP67 waterproof casing, and a replaceable battery with up to 5.7 years of operation, ensuring safe, wire-free monitoring in high-risk or hard-to-reach areas.

Key Features

• Detects presence of conductive liquids once the level reaches 0.5 mm
• Real-time buzzer alarm and lorawan® transmission
• Ultra-compact form factor – perfect for under sinks, basements, and server rooms
• IP67-rated waterproof ABS+PC enclosure – ideal for damp or wet environments
• Battery-powered (590 mAh CR2450) with up to 5.7 years of operation
• Supports Milesight D2D protocol for direct, ultra-low-latency device-to-device triggering
• Quick setup via NFC-enabled mobile app or lorawan® downlink
• Compatible with all standard lorawan® gateways and Milesight IoT Cloud

Technical Specifications

Ideal Applications

• Server Rooms & Data Centers
• Office & Residential Kitchens or Bathrooms
• Basements & Utility Rooms
• Under-Sink & HVAC Equipment Monitoring
• Smart Building Water Risk Mitigation

Mini Size. Mighty Protection. Smart Response.

The WS303 offers proactive water leakage detection and instant alerting in one of the smallest and most efficient lorawan®-enabled packages. Now available at TerraQ Technologies for smart deployments across the MEA region.