Milesight WS303 | Mini LoRaWAN Water Leakage Detection Sensor
Out of stock right now. We can order it in for you, or pick an in-stock alternative.
The Milesight WS303 is a compact LoRaWAN water leak sensor with a local audible alarm.
- Fast trigger: alarms at a water depth of 0.5 mm
- D2D: device-to-device control without a gateway
- Compact: 63 x 63 x 14 mm housing
Milesight WS303 | Mini LoRaWAN Water Leakage Detection Sensor - EU868 is backordered and will ship as soon as it is back in stock.
VAT & Business Purchases
VAT & Business Purchases
Prices are shown excluding VAT. For EU deliveries, VAT at the rate of your delivery country is added at checkout. EU businesses with a valid VAT number pay no VAT: enter your company name and VAT number at checkout and the order is invoiced under the intra-community reverse-charge rules. Orders delivered within Cyprus always include Cyprus VAT.
Secure Payment & Warranty
Secure Payment & Warranty
- Encrypted Checkout: Shop with confidence via Shopify Payments or PayPal Express for fully secure, PCI-compliant transactions.
- B2B Flexible Billing: For large-scale infrastructure orders, we offer Direct Bank Transfer (SEPA/SWIFT) options. Please contact our team for a pro-forma invoice.
- Warranty & Support: Consumer purchases are covered by the 2-year legal guarantee of conformity, and manufacturer warranty terms apply per brand. Our engineering team at shopioT provides technical support.
Delivery and Shipping
Delivery and Shipping
Tracked delivery within Cyprus by ACS Courier, and to all EU member states, the United Kingdom and Switzerland by FedEx International Priority. Orders ship from our warehouse in Nicosia, Cyprus, typically within 1–3 business days. Shipping cost is calculated at checkout by destination and parcel weight. See our Shipping Policy for rates and delivery times.
Milesight WS303 | Mini LoRaWAN Water Leakage Detection Sensor - EU868 is backordered and will ship as soon as it is back in stock.
Description
Description
The Milesight WS303 is a "tiny but mighty" LoRaWAN Leak Detection Sensor engineered for high-density smart building and office deployments. Designed to detect the presence of conductive liquids as soon as levels reach 0.5mm, it provides an essential early-warning system to prevent costly water damage. The device features a built-in buzzer for real-time local alarms, ensuring on-site personnel are notified immediately while data is simultaneously sent to the cloud. With its IP67 waterproof rating and support for the Milesight D2D protocol, the WS303 can communicate directly with valves or sirens in under a second, offering a fail-safe local automation layer that operates independently of network connectivity.
Real-Time Protection & Low Latency
Smart Infrastructure Scenarios
What is in the Box?
Product Certifications
Specifications
Specifications
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Primary Communication ProtocolLoRaWAN, Milesight D2D
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Frequency/RegionEU868
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Antenna TypeInternal
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LoRaWAN ClassClass A
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Radio & Range
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Configuration MethodNFC
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Activation MethodOTAA, ABP
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Monitoring ParametersWater Leak (Spot)
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Measurement Technology
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Measurement Range
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Power SourceBattery (Non-rechargeable)
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Battery TypeCR2450
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Battery Capacity590mAh
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Battery Life
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Dimensions
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Weight
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Enclosure MaterialPC (Polycarbonate), ABS Plastic
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Mounting OptionsWall Mount, Surface Mount
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IP RatingIP67
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Environment RatingIndoor, Outdoor
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Operating Temperature-10°C to +60°C
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CertificationsCE, FCC, RoHS
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Warranty2 Years
Document Library
Document Library
Payment & Security
Payment methods
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