Water Level Sensor 0–3 m LoRaWAN – Milesight EM500-SWL 868 (Probe L003-4846W)

The Milesight EM500-SWL 868 (Probe L003-4846W) is an industrial-grade submersible water level sensor designed for precise level measurement up to 3 meters. The stainless steel probe is directly immersed in the liquid, providing stable and accurate readings regardless of foam, wind, or rainfall.

Using a vented gauge pressure measurement principle, the sensor is well suited for continuous monitoring in wells, water tanks, cisterns, retention basins, and open water bodies. With ±0.5% FS accuracy and 0.01 m resolution, it delivers reliable data for infrastructure, industrial automation, and environmental monitoring projects.

Integrated LoRaWAN® connectivity (EU868) enables secure long-range wireless transmission with very low power consumption. This makes it ideal for remote or distributed installations where wired infrastructure is not available.

Powered by a 19,000 mAh Li-SOCL2 battery, the device can operate for up to 10 years depending on reporting interval and network configuration.

Configuration is performed via NFC using a mobile app or via USB Type-C on a PC. With IP67 protection for the transceiver and IP68 for the probe, the EM500-SWL is built for long-term outdoor deployment.

Typical applications include:

Groundwater monitoring

Tank and cistern level monitoring

Flood and river level monitoring

Stormwater basins

Industrial liquid level control

Agricultural irrigation systems

The EM500-SWL is engineered for professional IoT deployments requiring long-term, maintenance-free water level measurement.