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Mini Leak Detection Sensor


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Mini Leak Detection Sensor

Mini Leak Detection Sensor

Mini Leak Detection Sensor

Introducing the Milesight WS303 LoRaWAN Sensor, an advanced solution designed to revolutionise remote monitoring. Equipped with immediate warning capabilities both locally and remotely, this sensor ensures real-time alerts for critical events, empowering users with timely responses to potential risks. With its unique Milesight D2D communication feature, the WS303 establishes a reliable network for seamless data transmission, guaranteeing unparallelled connectivity even in challenging environments.

Experience unparallelled longevity with the Milesight WS303 LoRaWAN Sensor, boasting up to 5 years of battery life powered by a single coin cell battery. This exceptional durability ensures continuous operation with minimal maintenance requirements, making it an ideal choice for long-term deployments in various industrial and commercial settings. Furthermore, its robust IP67 waterproof protection safeguards the sensor against harsh weather conditions, ensuring reliable performance in outdoor applications.

With the Milesight WS303 LoRaWAN Sensor, users can effortlessly monitor and manage assets, environments, and processes with confidence. Whether deployed in agricultural fields, industrial facilities, or smart cities, this sensor delivers unmatched reliability, longevity, and connectivity, setting a new standard in remote monitoring solutions. Invest in the WS303 today and unlock the full potential of remote monitoring for enhanced efficiency and peace of mind.


Introducing the WS303, a compact yet powerful water leak detection sensor designed to safeguard against leaks and water damage. With its advanced features and seamless connectivity, it's the ideal solution for smart offices, buildings, and homes.

Immediate Alerts for Swift Action
The WS303 ensures prompt response by sounding an alarm and sending remote alerts whenever it detects water leaks, spills, or wet floors.

Exceptional Sensitivity
Utilising water conductivity, the WS303 sensor can detect even the slightest water level of 0.5 mm, thanks to its innovative circuit formed by two small metal probes. It's adaptable to various conductive liquids for versatile applications.

Efficient Communication with Milesight D2D
Enabled with Milesight D2D communication protocol and LoRa® technology, the WS303 facilitates seamless communication between different Milesight LoRaWAN® node devices without the need for a LoRaWAN® gateway, ensuring lower latency and reduced investment costs.

Enhanced Safety Measures
Featuring a power failure alarm triggered by capacitor storage, the WS303 guarantees uninterrupted operation. Its robust construction, including gold-plated probes and stainless steel screws, along with an IP67-rated enclosure, offers reliable protection against corrosion and ensures durability in diverse environments.

Easy Installation and Minimal Maintenance
The WS303's compact design allows for effortless installation on surfaces or walls without the hassle of wiring. Powered by a long-lasting coin cell battery, it boasts ultra-low power consumption, lasting up to 5 years without the need for frequent battery replacements.

Cloud-Based Data Management for Smart Insights
With cloud data management, the WS303 provides a comprehensive dashboard for visualising data, enabling automatic triggers for scene-based automation, generating regular reports, and delivering real-time alerts via an intuitive Android & iOS app.

NFC Configuration
NFC configuration allows for convenient wireless device setup and management.


Datasheet  User guide  Payload Decoder Firmware & SDK

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