---
product_id: 355690181
title: "3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3)"
brand: "yolink"
price: "67594 Ft"
currency: HUF
in_stock: true
reviews_count: 7
category: "Yo Link"
url: https://www.desertcart.hu/products/355690181-3-pack-smart-water-leak-sensor-1-4-mile-range
store_origin: HU
region: Hungary
---

# ¼ mile LoRa range 5+ years battery life Encrypted, no WiFi needed 3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3)

**Brand:** yolink
**Price:** 67594 Ft
**Availability:** ✅ In Stock

## Summary

> 💧 Stay leak-proof, stay ahead—because your smart home deserves the ultimate water watchdog!

## Quick Answers

- **What is this?** 3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3) by yolink
- **How much does it cost?** 67594 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/355690181-3-pack-smart-water-leak-sensor-1-4-mile-range)

## Best For

- yolink enthusiasts

## Why This Product

- Trusted yolink brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Resilient Offline Operation:** Patented device-to-device pairing keeps sensors active even during WiFi, internet, or power outages.
- • **Ultra-Low Maintenance Power:** Includes replaceable AAA batteries that last over 5 years—no frequent charging or replacements needed.
- • **Unmatched Long-Range Coverage:** LoRa tech delivers up to 1,320 feet of reliable, WiFi-free connectivity—even through walls and basements.
- • **Seamless Smart Home Integration:** Works effortlessly with Alexa, IFTTT, and the YoLink Hub for real-time alerts and smart automation.
- • **Set It & Forget It Installation:** Instant setup with no wiring—just place near vulnerable spots and gain peace of mind in seconds.

## Overview

The YoLink 3 Pack Smart Water Leak Sensor uses advanced LoRa wireless technology to provide an industry-leading ¼ mile range without relying on WiFi or internet. Designed for easy installation near water-prone areas, it offers encrypted, reliable communication with a YoLink Hub (sold separately). With over 5 years of battery life and compatibility with Alexa and IFTTT, it ensures continuous monitoring and instant notifications—even during power or network outages.

## Description

YoLink Technology “YoLink'' is a proprietary wireless technology provided by YoSmart. which is based on the Semtech's LoRa wireless technology combined the YoSmart smart home/buiding protocol, to provide most advanced smart home/buidling devices solution. Compared to WIFI, Bluetooth, ZigBee, Z-Wave and other smart home protocol, it has the advantages of low-power consumption, long-distance coverage (wall penetration), and anti-interference. It is first smart building/home protocol which can be very easily setup and is very low cost, but create a reliable, robust and more secure IoT network. Requirements: 1. A YoLink Hub, link 2. Smartphone or tablet able to run iOS 9 or higher or Android 4.4 or higher. Specifications: Product Name: YoLink Smart Water Leak Sensor Product Model: YS7903-UC Voltage: 3V DC (2 AAA battery) Product Model: YS7903-UC Working Temperature: 0°C-50°C (32°F-122°F) Working Humidity: ≤100%RH (non-condensing) Package Content: 3 x YoLink Water Leak Sensor 1 x Quick Start Guide

Review: It is US wifi not Uk - Works well once reset to Europe wifi but it would not connect with their European/UK hub without a fair amount of resetting and liaison with tech support. I was expecting this so was not a problem for me.
Review: Does not work in UK, description not clear - The hub and temperature sensors work well and are connected immediately. I purchased the 3-pack water leak sensors but did not realise the difference between UC and EC on the labels. UC does not work in the UK; you need to buy EC. I contacted tech support, but after an initial hello, I have been ghosted!

## Features

- NO WiFi WORRIES! YoLink devices communicate by LoRa, an industrial-grade protocol that provides up to ¼ mile open air range. Devices do NOT connect to your network or even to the internet; they communicate with the Hub (Not included!). Long range, obstruction penetration, no reliance on WiFi, and fully-encrypted communications provide more than most ask for from their smart home system!
- SET IT & FORGET IT! Installs in seconds! The YoLink wireless Water Sensor could not be easier to install; just place near or under the equipment you wish to monitor. Suggested uses are near or under, toilets, water heaters, laundry machines, dishwashers, sinks, fish tanks, in or near sump pumps, and by any other location subject to water leaks and flooding.
- EXTREME LONG RANGE! Powered by LoRa technology, the long-range yet low-power system offers the industry’s longest receiving range in the market (1/4 mile). Our long-range coverage enables its use in areas challenging for most residential Wi-Fi systems, such as basements, outdoor porch/patio areas, sheds, free-standing garages, even remote outbuildings on your property.
- NO WIFI, NO INTERNET, NO POWER? NO PROBLEM! Our patented Control-D2D device-to-device pairing, over our LoRa-based wireless network, allows for devices to be paired to each other, in such a way they will continue to operate, even if WiFi is flaky, the internet goes down, or the AC power goes out!
- START SMART! A YoLink hub is required for full functionality, including for the app to work, to check battery level, etc, but your hub is compatible with a growing family of smart products for home and business! Search for B09FSS95G9 for a SpeakerHub (our audio, talking hub) or B07TQLKQLJ for the original Hub.
- BATTERIES INCLUDED! Two replaceable AAA batteries, good for over 5 years, are included!
- AVAILABLE AS A STARTER KIT! Search for B0BFR7WJQT

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B083Z5Z9HM |
| Batteries | 6 AAA batteries required. |
| Batteries Required? | No |
| Batteries included? | No |
| Battery Cell Type | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 554,386 in DIY & Tools ( See Top 100 in DIY & Tools ) 251 in Water Detectors |
| Control method | App |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,321) |
| Date First Available | 16 Jan. 2020 |
| Item Package Quantity | 1 |
| Item Weight | 249 g |
| Item model number | YS7903 |
| Manufacturer | YoSmart |
| Maximum range | 1320 Feet |
| Mounting type | Tabletop Mount |
| Number of batteries | 6 AAA batteries required. |
| Part Number | YS7903-UC*3 |
| Product Dimensions | 6.4 x 6.4 x 2.5 cm; 249 g |
| Sensor technology | Water Leak Sensor Technology |
| UPC | 750258361643 |
| Voltage | 3 Volts |

## Product Details

- **Brand:** YoLink
- **Colour:** White
- **Compatible devices:** YoLink Hub
- **Power source:** Battery Powered
- **Product dimensions:** 6.1L x 6.1W x 6.1H centimetres

## Images

![3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3) - Image 1](https://m.media-amazon.com/images/I/519l0Q74TDL.jpg)

## Questions & Answers

**Q: Can you replace the batteries?**
A: Yes, there are rubber tips on the 4 corners of the bottom, you can remove them and unscrew 4 screws and open the sensor, to replace two AAA batteries. The battery can run more than 5 years. You can search on YouTube video of how to change the YoLink water sensor's battery and can find the videos. Thanks!

**Q: Is this a dumb proprietary system or does it ingrate with smart home technologies, ie Z-wave Zigbee etc?**
A: It is not Zigbee, WiFi or Z-Wave wireless technologies, all these wireless technologies only work for short range. The YoLink system use the longest wireless range and lower power consumption. It works with the YoLink hub and can be integrate to other system through the Alexa routines, IFTTT or YoLink's API. Thanks!

**Q: Do you have any water leak sensors that have audio as well as the app reminder? Or are these just app reminders?**
A: These 3 pack leak sensors don't have build in audio sound. We have YoLink water leak sensor 2 which has build in sound, both them have app push notifications, emails and text message for leak alert.

**Q: What frimware version do you have on these D or E? Tx**
A: Mine came with 030E installed. The sensors I bought previously had 030D installed and still aren't being offered the 030E update even though they are the exact same model number. I also don't know the difference between 030D and 030E as they don't seem to publish any firmware changelog that I can find.

## Customer Reviews

### ⭐⭐⭐⭐ It is US wifi not Uk
*by M***L on 9 July 2024*

Works well once reset to Europe wifi but it would not connect with their European/UK hub without a fair amount of resetting and liaison with tech support. I was expecting this so was not a problem for me.

### ⭐ Does not work in UK, description not clear
*by J***. on 4 February 2025*

The hub and temperature sensors work well and are connected immediately. I purchased the 3-pack water leak sensors but did not realise the difference between UC and EC on the labels. UC does not work in the UK; you need to buy EC. I contacted tech support, but after an initial hello, I have been ghosted!

### ⭐⭐⭐⭐⭐ Review
*by L***R on 7 March 2025*

After having constant issues with the Guardian water leak detection system, I was on the hunt for a more reliable and user-friendly alternative, and I’m so glad I found the YoLink Smart Water Valve Controller! The installation was a breeze, taking me around 30 minutes to set up the controller, and a bit more time to configure and place 16 leak detectors around the house. The process was straightforward and easy, even without the need for a plumber – it's truly DIY-friendly. Now, comparing this to the Guardian system is like night and day. The Guardian was a headache, constantly failing, poorly designed, and honestly, it cost a fortune. Each Guardian controller was $50, and they kept failing on me. With YoLink, I’ve found a much more reliable and cost-effective solution that works exactly as advertised. Setting up the YoLink system was incredibly intuitive. The app is user-friendly, and I was able to easily configure the settings, including the wireless range, which works flawlessly. Even with multiple walls between devices, the system remained reliable with no drop in connection. It’s great to have peace of mind knowing that everything is connected, and I can manage it all from my phone. One tricky part for me was figuring out how to automatically trigger the water valve to close when a leak is detected, but I solved that by using the Automation tab in the app. Once I set up the events, the system worked perfectly. Thankfully, I didn’t need to watch the instructional videos since I’m already familiar with these kinds of systems. I’m beyond impressed with how well this system works. It’s easy to update and configure, and I now have total peace of mind knowing my home is protected against water leaks. If you’re tired of dealing with a poorly designed, expensive system like I was, I highly recommend the YoLink Smart Water Valve Controller! It’s been a total game changer for me. **A++++ – Highly Recommended!**

## Frequently Bought Together

- YoLink Water Leak Sensor 3-Pack, LoRa Up to 1/4 Mile Open-Air Range Smart Water Leak & Flood Detector, SMS/Text, Email & Push Notifications, w/Alexa, IFTTT, Home Assistant - YoLink Hub Required
- YoLink Smart Home Starter Kit: Hub & Water Leak Sensor 4-Pack, SMS/Text, Email & Push Notifications, LoRa Up to 1/4 Mile Open-Air Range, w/Alexa, IFTTT, Home Assistant
- YoLink Smart Wireless Temperature & Humidity Sensor, Wide Temp Range for Fridge, Green House, Pet Cage, App Alerts, Emails, Text/SMS alerts- Hub Required

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-26*