WS303

In Stock

Mini Leak Detection Sensor

Compact IP67 water-leak detection with local buzzer alarm and up to 5 years of battery life.

Features

  • Detects conductive liquid leaks
  • Trigger at just 0.5 mm liquid level
  • IP67 waterproof enclosure
  • Built-in buzzer for local alarms
  • Milesight D2D, gateway-free control
  • One-touch NFC configuration
  • Battery life up to 5 years

Hardware

  • Conductive-liquid water probe
  • IP67 rated enclosure
  • 1 Ă— 590 mAh CR2450 battery
  • 63 Ă— 63 Ă— 14 mm, 36.4 g
  • ABS + PC, white
  • LoRaWAN and Milesight D2D

Applications

Smart offices, buildings, homes, server rooms, kitchens, bathrooms.

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    Description

    WS303 Description

    Overview

    The WS303 is a tiny yet capable leak detection sensor. It detects the presence of water and sends an alarm over LoRaWAN, helping prevent damage and costly losses from undetected leaks.

    Leak Detection

    A small water probe detects conductive liquids and triggers as soon as the liquid level reaches just 0.5 mm. This gives early warning before a small leak becomes a major problem.

    Rugged & Wire-Free

    An IP67 waterproof enclosure suits harsh and wet environments, while a replaceable 590 mAh battery delivers up to 5 years of wire-free operation for clean, flexible placement.

    Local & Direct Alarms

    A built-in buzzer raises a real-time alarm on site, while Milesight D2D lets the WS303 link directly with other Milesight devices, without a gateway, to trigger valves or other responses instantly.

    Setup

    One-touch NFC configuration through the Milesight ToolBox app makes setup quick. Mount it on a desktop or with 3M tape wherever leaks may occur.

    Industry Applications

    WS303 Industrial Applications

    Smart Buildings

    Plant rooms and risers detect leaks early to prevent water damage. D2D control can shut valves instantly even without a gateway nearby.

    Data Centres

    Server rooms guard sensitive equipment against leaks under floors and near cooling. The IP67 body suits demanding environments.

    Hospitality

    Hotels monitor bathrooms, kitchens and utility areas for leaks. Local buzzer alarms alert staff before damage spreads.

    Homes & Offices

    Homes and offices place compact sensors under sinks and appliances. LoRaWAN gives wide, low-power coverage with minimal wiring.

    Specifications

    Wireless Transmission

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

    Leakage Detection

    Liquid Type Conductive liquid
    Trigger Condition Once liquid level reaches 0.5 mm

    Interface & Software

    Buzzer Supported
    Configuration Mobile app via NFC or downlink
    Advanced Feature Milesight D2D controller, water leakage alarm

    Physical Characteristics

    Power Supply 1 × 590 mAh CR2450 lithium battery (replaceable)
    Battery Life ~5.7 years (one hour leakage per week, 25 °C)
    Operating Temperature −10 °C ~ +60 °C
    Relative Humidity 0 ~ 100% (non-condensing)
    Ingress Protection IP67
    Material & Color ABS + PC, white
    Weight 36.4 g (battery included)
    Dimensions 63 × 63 × 14 mm
    Installation 3M tape mounting or desktop

    Approvals

    Regulatory CE, FCC
    Environmental RoHS
    Order Codes

    Order Codes

    SKU: WS303

    WS303 – LoRaWAN mini leak detection sensor, IP67, with buzzer and D2D (specify frequency band: EU868, US915, AS923, etc.)

    Order by referencing the SKU – contact info@easynt.com

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