Skip to content

WS303-868M - Mini Leak Detection Sensor

SKU WS303-868M

WS303 is a tiny and mighty leakage detection sensor for detecting the presence of water leaks and transmitting an alarm using LoRaWAN® technology. With this low power consumption technology, WS303 can work up to 5 years with a 590mAh battery. Compliant with Milesight D2D protocol, it can directly link with other Milesight devices to realize danger prevention and effectively prevent unnecessary loss.

The wire-free WS303 can be easily used in smart offices, buildings, and houses. Users can receive real-time alarms via a built-in buzzer locally and a mobile App remotely. Combined with a Milesight LoRaWAN®gateway, users can manage all sensor data remotely and visually.


  • Detect the presence of conductive liquids using a small water probe
  • A replaceable built-in 590mAh battery with up to 5 years of life for wire-free power supply
  • IP67 waterproof enclosure for harsh environment applications
  • Embedded with a buzzer for real-time alarming
  • Support Milesight D2D protocol to enable ultra-low latency and direct control without gateways
  • Equipped with NFC for easy configuration
  • Compliant with standard LoRaWAN ® gateways and network servers

Measuring Range

  • Liquid Type: Liquid Type Conductive Liquid
  • Trigger Condition: Once Liquid Level Reaches 0.5mm


Documentation & Downloads for WS303-868M

Do you have a question about this product?

Recently Viewed Items