Milesight liquid level detection at only 0.5 mm
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Water detection with liquid levels as low as 0.5 mm - Replaceable 590 mAh battery with up to 5.7 years of life - Local alarm via integrated sensor buzzer - D2D protocol for direct control without the need for a gateway - NFC configuration from a smartphone without opening the device - IP67 submersible for cellars, pipes, and outdoors
📋 SPECIFICATIONS:
• Model: WS303
• Type: Contact water leak detection sensor
• Technology: Wireless LoRaWAN + Milesight D2D (Device-to-Device)
• Antenna: Internal
• Supported frequencies: CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1&2&3&4
• Transmission power: 16 dBm (868 MHz) / 20 dBm (915 MHz) / 19 dBm (470 MHz)
• Reception sensitivity: -137 dBm @ 300 bps LoRaWAN OTAA / ABP mode, Class A Detectable liquids Conductive liquids (water, saline solutions, conductive coolants)
• Activation threshold: 0.5 mm water level on contacts
• Local alarm: Integrated piezoelectric buzzer (~85 dB at 10 cm)
• Remote alarm: Push notifications via Milesight IoT Cloud / Mobile App D2D Protocol Direct control of Milesight valves and actuators without a gateway
• Configuration: NFC (Milesight Toolbox mobile app) or LoRaWAN Downlink Power supply 1 × 590 mAh CR2450 lithium battery (user-replaceable)
• Estimated battery life: Up to 5.7 years (1 leak of 1 hour per week, 25 °C, laboratory conditions)
• Operating temperature: -10 °C to +60 °C Relative humidity 0% to 100% (non-condensing)
• Protection: IP67 (resistant to temporary immersion)
• Dimensions: 63 × 63 × 14 mm Weight 36.4 g (with battery) / 29.8 g (without battery)
• Material and color: ABS+PC housing, white Installation method 3M adhesive tape (included) or placed on a flat surface
• Certifications: CE, FCC, RoHS
• Compatible platforms: Milesight IoT Cloud, Milesight Development Platform, any standard LoRaWAN network server
• Typical applications: Server rooms, basements, bathrooms, archives, industrial kitchens, homes, smart offices
📦 INCLUDED:
• 1x Milesight WS303 leak detection sensor
• 1x 590 mAh CR2450 lithium battery (pre-installed and replaceable)
• 1x Quick installation guide and technical documentation
• 1x 3M adhesive for surface mounting
| Model | WS303 |
|---|---|
| Type | Contact-based water leak detection sensor |
| Technology | LoRaWAN wireless + Milesight D2D (Device-to-Device) |
| Antenna | Internal |
| Supported frequencies | CN470 / IN865 / RU864 / EU868 / US915 / AU915 / KR920 / AS923-1&2&3&4 |
| Transmission power | 16 dBm (868 MHz) / 20 dBm (915 MHz) / 19 dBm (470 MHz) |
| Reception sensitivity | -137 dBm @ 300 bps LoRaWAN OTAA/ABP mode, Class A Detectable liquids Conductive liquids (water, saline solutions, conductive coolants) |
| Activation threshold | 0.5 mm water level on contacts |
| Local alarm | Integrated piezoelectric buzzer (~85 dB at 10 cm) |
| Remote alarm | Push notifications via Milesight IoT Cloud / Mobile App D2D Protocol Direct control of Milesight valves and actuators without a gateway |
| Configuration | NFC (Milesight Toolbox mobile app) or LoRaWAN Downlink Power supply 1 × 590 mAh CR2450 lithium battery (user-replaceable) |
| Estimated battery life | Up to 5.7 years (1 leak of 1 hour per week, 25 °C, laboratory conditions) |
| Operating temperature | -10 °C to +60 °C Relative humidity 0% to 100% (non-condensing) |
| Protection | IP67 (resistant to temporary immersion) |
| Dimensions | 63 × 63 × 14 mm Weight 36.4 g (with battery) / 29.8 g (without battery) |
| Material and color | ABS+PC housing, white Installation method 3M adhesive tape (included) or placed on a flat surface |
| Certifications | CE, FCC, RoHS |
| Compatible platforms | Milesight IoT Cloud, Milesight Development Platform, any standard LoRaWAN network server |
| Typical applications | Server rooms, basements, bathrooms, archives, industrial kitchens, homes, smart offices |
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The legal warranty lasts 2 years for private individuals (consumers) and 1 year for VAT holders (professionals or companies)