Milesight Sensor WS303-868M
Milesight WS303 is a smart water leak detector with two stainless steel probes that detect water as low as 0.5 mm. It features a built-in buzzer for local alerts, sends notifications through LoRaWAN, and offers up to 5 years of battery life. Its compact IP67 design allows installation even in hard-to-reach places.
General configuration
Overview
For sensor configuration, use the Milesight ToolBox mobile application, available on both:
Installation and configuration
- Configuration is done via NFC.
- After reading the device, go to the Basic Information tab to update the Device Time.
- Setting the correct date and time is required for all devices.
LoRaWAN connection
- Devices are preconfigured with an AppKey for OTAA (default values are listed in the user manual).
- The gateway must be set to Public. If the gateway is configured as Private, devices will not be able to join the network.
Power supply
| Type | Value |
|---|
| Power | CR2450 battery |
LoRaWAN configuration
| Parameter | Value |
|---|
| Join type | OTAA |
| AppEUI | 24E124C0002A0001 |
| AppKey | 5572404C696E6B4C6F52613230313823 |
Data Encoding & Decoding
Technical Specifications
| Parameter | Value |
|---|
| Wireless Transmission | |
| Technology | LoRaWAN®, Milesight D2D |
| Antenna | Internal |
| Frequency | CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1&2&3&4 |
| Tx Power | 16 dBm (868MHz) / 20 dBm (915MHz) / 19 dBm (470MHz) |
| Sensitivity | -137 dBm @300bps |
| Mode | OTAA / ABP Class A |
| Leakage Detection | |
| Liquid Type | Conductive liquid |
| Trigger Condition | ≥ 0.5 mm liquid level |
| Others | |
| Buzzer | Yes |
| Configuration | NFC App / Downlink |
| Advanced Features | D2D Controller, Water Leakage Alarm |
| Physical Characteristics | |
| Power Supply | 1 × CR2450 (590 mAh) |
| Battery Life | ~5.7 years (typical use, 25°C) |
| Operating Temp | -10°C ~ +60°C |
| Humidity | 0%–100% RH (non-condensing) |
| Ingress Protection | IP67 |
| Dimensions | 63 × 63 × 14 mm |
| Weight | 36.4 g (incl. battery) |
| Material | ABS+PC, White |
| Installation | 3M Tape / Desktop |
| Approvals | CE, FCC, RoHS |
Integration resources and distribution links