Dragino WL03A-NB NB-IoT Rope Water Leak Sensor (Extendable)

The Dragino WL03A-NB is an NB-IoT rope-type water leak sensor designed for practical, area-wide leak detection. Instead of monitoring just a single point, you route the leak rope/cable exactly where water would show up first—along pipe runs, around boilers and pumps, near HVAC condensate lines, or around critical equipment. The system is extendable, so you can add extra leak ropes to cover larger rooms, full perimeters, or long technical corridors.

When water is present on the detection rope, the WL03A-NB triggers a leak event and uplinks the alarm to your IoT server via the NB-IoT cellular network. It also sends periodic data (commonly every 2 hours) and keeps useful event metrics: it counts leak occurrences and calculates the duration of the last leak event—helpful for troubleshooting and maintenance follow-up.

Popular industries and strong real-world use cases:

Boiler rooms / mechanical rooms: Early warning near boilers, pumps, joints, valves, and condensate drains.

Server rooms & data centers: Running the rope under raised floors or around rack zones to detect water before it reaches critical IT.

Facility management: Protecting risers, utility rooms, pump rooms, and pipe-dense areas.

Industrial sites: Monitoring cooling water or process-water lines where downtime and damage costs are high.

Retail sites, warehouses, branches: Protecting technical backrooms with piping and expensive assets.

For integrations, the WL03A-NB supports multiple uplink methods including MQTT, MQTTS, TCP, and UDP, which makes it easy to connect to many IoT backends. Setup and maintenance are straightforward with Bluetooth (BLE) for local configuration and OTA firmware updates. Some variants also offer an optional built-in SIM and default server connection option for quick deployments.