WS303 Mini Leak Detection Sensor

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. Combining with Milesight LoRaWAN^® gateway and Milesight IoT Cloud, users can manage all sensor data remotely and visually.

Smart Water Leak Detection Solution

Introducing WS303, the mini water leak detection sensor That detects the presence of leaks and raises alarms locally and remotely. With low power consumption, it can operate for 5 years on a single battery. It’s ideal for smart offices, buildings, houses, etc.

Immediate Warning
Against Water Damage

WS303 will sound an alarm and send a remote alert when water leakage occurs.

Sensitivity That Exceeds
Expectations

The WS303 sensor uses water conductivity to detect a minimum water level of 0.5 mm by forming a circuit with two little metal probes. (Other conductive liquids are also supported.)

Milesight D2D
Communication

Milesight D2D (Device to Device) communication protocol featuring LoRa® enables the communication among different Milesight LoRaWAN® node devices without a LoRaWAN® gateway.

• Lower Latency
• Less than 1 Second Response Time
• Secure Transmission
• Reduce Investment Cost

Power Failure Alarm

WS303 includes capacitor storage to trigger a power failure alarm.

NFC Configuration

Switching On/Off & Configuring the Devices Wirelessly

1^st Step

Install the
Milesight ToolBox

2^nd Step

Enable NFC and run ToolBox,
then attach your phone to the device

3^rd Step

Verify the password
and start configuring

• 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
• Quick and easy management with Milesight IoT Cloud solution

Wireless Transmission

Technology LoRaWAN®, Milesight D2D
Frequency CN470/IN865/RU864/EU868/US915/AU915/KR920/AS923-1&2&3&4
Tx Power 16dBm(868 MHz)/20dBm(915 MHz)/19dBm(470 MHz)
Sensitivity -137dBm @300bps
Mode OTAA/ABP Class A

Leakage Detection

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

Others

Buzzer Support
Configuration NFC Configuration via Mobile App
Advanced Feature Milesight D2D Controller

Physical Characteristics

Power Supply 1 × 590mAh CR2450 Lithium Battery
Battery Life 5 years (One hour leakage per week, 25°C)
Operating Temperature -10°C to +60°C
Relative Humidity 0% to 100% (Non-condensing)
Ingress Protection IP67
Dimension 63 × 63 × 14 mm
Material & Color ABS+PC, White
Installation 3M Tape Mounting, Desktop