# Leak Detection Sensor Milesight WS303-868M — Mini LoRaWAN water leak detector

**URL:** https://aio.lv/en/product--milesight-ws303-868m--10955814
**Data updated:** 2026-03-07 18:11 (EET)
**Category:** Smart Sensors
**Manufacturer:** Milesight
**Manufacturer code:** WS303-868M
**EAN:** 6974225039944
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 88.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 73.13 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--milesight-ws303-868m--10955814

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 08.07.2026 | free |
| Pickup points | 13.07.2026 | 1.99 EUR |
| Courier delivery to door | 13.07.2026 | 4.99 EUR |

## Summary description

Mini leak detection sensor Milesight WS303-868M is a compact LoRaWAN device for detecting water leaks and moisture. Designed for remote monitoring, it reports leak events over LoRaWAN networks and fits tight spaces. Suitable for basements, utility rooms, server racks and industrial sites to enable timely alerts and reduce water damage risks.

## Long description

The Milesight WS303-868M Mini LoRaWAN water leak detector is a compact sensor designed to detect water presence and leakage in confined or hard-to-reach spaces. Intended for integration with LoRaWAN networks, the device transmits leak events and moisture status to a central gateway, enabling remote monitoring without frequent on-site checks. Its small footprint makes it suitable for basements, utility rooms, server cabinets and industrial areas where early detection of water can prevent equipment damage and operational downtime.
Advantages
The WS303-868M offers low-power operation and wireless long-range communication via LoRaWAN, providing extended battery life and reduced maintenance. Its compact design allows installation in narrow gaps and constrained environments. The sensor delivers reliable binary leak detection and periodic status updates to support automated alerting and integration with monitoring systems. Simple mounting options and compatibility with standard LoRaWAN infrastructure make it convenient to deploy at multiple locations.
Suitable for
 Basements and crawl spaces where moisture accumulation is a concern
 Utility rooms and boiler rooms near water pipes and valves
 Server rooms and network cabinets to protect electronic equipment
 Industrial facilities and warehouses with water-sensitive processes or inventory
Key specifications
 Wireless protocol: LoRaWAN (868 MHz band)
 Detection type: contact-based water/leak detection and moisture presence
 Form factor: compact, low-profile enclosure for tight spaces
 Power: battery-powered with low-power design for prolonged operation
 Communications: periodic telemetry and event-driven alarm transmission
 Operating environment: indoor use in areas exposed to potential leakage
How to use
Place the WS303-868M sensor at floor level or in the area where water ingress is likely to occur, ensuring the sensing contact points are positioned to detect liquid reach. Configure the device on a LoRaWAN network via the network server and assign the appropriate application settings for alarm thresholds and reporting intervals. After commissioning, monitor incoming telemetry and set up automated notifications or integrations with building management and monitoring platforms to receive timely alerts on leak events.
Usage recommendations
Install the detector on a stable, level surface and avoid locations with constant splashing that could cause false positives. Test the sensor after setup to confirm communication with the LoRaWAN gateway and adjust reporting intervals to balance timely alerts with battery life. For critical assets, consider using multiple sensors to cover high-risk zones and include sensor status checks in routine maintenance plans.

## FAQ

### How much does the Leak Detection Sensor Milesight WS303-868M cost, and is it available for purchase?

The price is 88.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 08.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Leak Detection Sensor Milesight WS303-868M be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Milesight products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Milesight service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/10955814/68543417_large.webp