Milesight Mini Water Leak Sensor - WS303

Milesight Mini Water Leak Sensor - WS303 is a compact, wireless water leak sensor that triggers instant alerts upon leak detection and supports D2D automatic response, helping prevent water damage, ideal for smart homes, museums, and other design-sensitive spaces. 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 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 Mobile App via NFC or Downlink Advanced Feature Milesight D2D Controller, Water Leakage Alarm Physical Characteristics Power Supply 1 × 590mAh CR2450 Lithium Battery Battery Life* Around 5.7 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 Weight 36.4g (Battery included), 29.8g (Battery excluded) Material & Color ABS+PC, White Installation 3M Tape Mounting, Desktop Approvals Regulatory CE, FCC Environmental RoHS * Tested under laboratory conditions and for guideline purposes only. WS303 Data Sheet