Milesight Leak Sensor EM300-SLD-868M

The Milesight EM300‑SLD‑868M is a high-precision spot leak detection sensor designed to detect the presence of conductive liquids such as water, weak acids, or bases. It activates an alert when the liquid level reaches 5 mm, providing reliable detection for use cases like pipe leakage, basement flooding, pump failure, or equipment protection.

The sensor integrates LoRaWAN® wireless communication and Milesight D2D protocol for ultra-low-latency device-to-device control — even without a gateway. With its IP67-rated, UV-resistant housing, it withstands harsh environments. The device also features a built-in temperature and humidity sensor, expanding its environmental monitoring capabilities.

Key features include:

• Long-range transmission up to 10 km (line of sight)

• Local data storage of up to 2,800 entries

• Data retransmission to prevent loss

• Simple NFC configuration via mobile app

• Compact and durable design

• Stainless steel 316 probe for corrosion-resistant detection

Powered by a 4000 mAh replaceable battery (optional 8000 mAh), the EM300‑SLD can operate for over 10 years under typical usage conditions. Installation is simple and flexible using wall screws, 3M tape, or cable ties for both the sensor and probe.

The EM300‑SLD is fully compatible with Milesight gateways, the Milesight Development Platform, and IoT Cloud solutions, allowing real-time remote monitoring, smart automation, and rapid alerting when leaks occur.