--- product_id: 455122794 title: "Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC" brand: "yolink" price: "€ 73.28" currency: EUR in_stock: true reviews_count: 5 category: "Yo Link" url: https://www.desertcart.pt/products/455122794-water-leak-sensor-2-1-4-mile-worlds-longest-range store_origin: PT region: Portugal --- # 1/4 mile LoRa range Alexa & IFTTT compatible 105dB built-in siren Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC **Brand:** yolink **Price:** € 73.28 **Availability:** ✅ In Stock ## Summary > 💧 Stay dry, stay smart — the ultimate water watchdog for your home! ## Quick Answers - **What is this?** Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC by yolink - **How much does it cost?** € 73.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/455122794-water-leak-sensor-2-1-4-mile-worlds-longest-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 - • **Instant Flood Alerts:** Receive real-time smartphone notifications, SMS, and emails to stop water damage before it starts. - • **Powerful Built-In Siren:** 105dB siren ensures immediate on-site alerts, adding an extra layer of protection to your smart home. - • **Unmatched Long-Range Coverage:** Industry-leading 1/4 mile wireless range powered by LoRa tech—perfect for basements, garages, and remote outbuildings. - • **Seamless Smart Home Integration:** Works effortlessly with Alexa and IFTTT for custom automations and voice control—future-proof your home. - • **Effortless Setup & Versatile Placement:** Plug-and-play design with a 4.2 ft sensor cable (extendable to 10 ft) for monitoring sump pumps, dishwashers, aquariums, and more. ## Overview The YoLink Water Leak Sensor 2 is a cutting-edge smart home device featuring the world's longest wireless range of 1/4 mile via LoRa technology, a powerful 105dB built-in siren, and seamless compatibility with Alexa and IFTTT. Designed for indoor use, it offers real-time flood alerts through smartphone notifications, SMS, and email, helping prevent costly water damage. Its easy installation and versatile sensor cable make it ideal for monitoring critical water-prone areas like basements, sump pumps, and appliances. Requires the YoLink Hub (sold separately) and supports advanced automation for proactive home protection. ## Description INTRODUCTION:Smart water detector with built-in siren, detects the presence or absence of water, and displays the status on the YoLink appNote: For water detection, only, without an integral siren, consider our original Water Leak SensorREQUIREMENTS:YoLink Hub with internet connection (wired Ethernet or 2.4GHz Wi-Fi). Please search B07TQLKQLJ for the HubSmartphone or tablet running iOS 9 or higher, Android 4.4 or higherTECHNICAL SPECS:Power: 2 AAA batteries (3V DC)Dimension [L x W x D]: 2.44 x 2.44 x 0.80 inches (83.06 x 30.99 x 14.99 mm)Cable Sensor: 4.2 feet (1.2 meters), can be extended to 10 feetOperating Temperature Range: 32°F – 122°F (0°C – 50°C)Operating Humidity Range: ≤95%RH non-condensingIntended for indoor use only APPLICATIONS:Place the YoLink Water Leak Sensor 2 anywhere that is at risk of high moisture or water, due to leaks or floodingUse the YoLink smartphone app to remotely monitor the status of your water leak sensors in your home, rental property, condo, summer home or business (internet connection and YoLink Hub required) YoLink’s industry-leading long range communication allows for placing the sensor in your barns, separate garage building, greenhouse, etc.Some common applications include:Locations at or below grade, subject to water incursionBasement floorsNear sump pumpsUnder sinksNext to toiletsUnder or near laundry machinesUnder dishwashersUnder refrigerators & ice machines Under fish tanks/aquariumsInside hot tubs**Refer to device environmental limitations in Technical Specs, above. Use this device outside the recommended ranges at your own risk; warranty may be voided, etc.PACKAGE CONTENTS:(1) YoLink Water Leak Sensor 2 (batteries included)(1) Cable Sensor(1) Mounting Hook(1) Quick Start Guide PLEASE NOTE:YoLink products work only in the USA and Canada Review: Very much recommended! - This is only one of the line of YoLink products that we purchased and all of them are very reliable, easy to operate and recommended! This one I'm using as alert for sump pump. Hi availability, long range coverage and reliability. Various scenarios can be programmed and alarms will be received. Shareable monitoring. Review: Don't buy refund still outstanding £100 - They do not understand a word of English ,I feel I have been transported to a hawkers stall in my home country. I had to call call to get a refund Products are equally unreliable as the people behind it. Quick money ## Features - Smart Water Leak Detector: Monitor critical locations at risk of flooding, and be informed immediately of the presence of water, preventing costly repairs; Smart Water Level Monitoring: The sensor may be configured for water level monitoring – be informed when water is no longer present or when water levels recede. Monitor water supplies for pet care, house plants, gardening and more. - World's Longest Wireless 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. - Early-Warning Notifications: Receive real-time early-warning notifications and protect your home and property from water damage. Notifications are in the form of smartphone banner alerts, limited SMS/text messages and emails, each optional and configured per your needs. Additionally, you may configure your system to activate a siren alarm and/or lights in your home. - Easy and Effective Property Protection: 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 sump pumps, toilets, water heaters, laundry machines, dishwashers, sinks, fish tanks and any other location subject to water leaks and flooding. - From Simple to Super-Smart: After setting up your notification preferences, keep it simple and let the YoLink system do the rest and monitor your home and property for you. Or, utilize available advanced automation features, including 3rd-party integration with Alexa and IFTTT, to interact with other YoLink and 3rd-party smart devices. Limited only by your imagination! (YoLink Hub is required, sold separately; Please search B07TQLKQLJ for the Hub) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08P1WD66X | | Best Sellers Rank | #266,044 in Home Improvement ( See Top 100 in Home Improvement ) #434 in Water Detectors | | Brand | YoLink | | Brand Name | YoLink | | Customer Reviews | 4.5 out of 5 stars 414 Reviews | | Importer Contact Information | Shop The World B112 Virwani Industrial estate Western Express Highway Goregaon east Mumbai 400063 Email care@shoptheworld.in www.shoptheworld.in WhatsApp no +919820168421 | | Item Dimensions | 8.3 x 1.5 x 3.1 Centimeters | | Item dimensions L x W x H | 8.3 x 1.5 x 3.1 Centimeters | | Manufacturer | YOSMART | | Maximum Supply Voltage | 3 Volts (DC) | | Measuring Range | 32°F - 122°F | | Model Number | YS7904-UC | | Mounting Type | Wall Mount | | Output Type | Digital | | Packer Contact Information | Shop The World B112 Virwani Industrial estate Western Express Highway Goregaon east Mumbai 400063 Email care@shoptheworld.in www.shoptheworld.in WhatsApp no +919820168421 | | Part Number | YS7904-UC | | Sensing Distance | 0.25 Miles | | Style | Water Leak Sensor 2 | | Style Name | Water Leak Sensor 2 | | UPC | 850024791091 | | Unit Count | 1.0 Count | | Upper Temperature Rating | 122 Degrees Fahrenheit | ## Product Details - **Brand:** YoLink - **Colour:** White - **Compatible Devices:** Smartphone, Tablet - **Power Source:** Battery Powered - **Product Dimensions:** 6.2L x 6.2W x 2H Centimeters ## Images ![Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC - Image 1](https://m.media-amazon.com/images/I/51xkkGlZDWL.jpg) ![Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC - Image 2](https://m.media-amazon.com/images/I/71OAfo6yZrL.jpg) ![Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC - Image 3](https://m.media-amazon.com/images/I/91l2SvJ12JL.jpg) ![Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC - Image 4](https://m.media-amazon.com/images/I/91Z922nLwDL.jpg) ![Water Leak Sensor 2 - 1/4 Mile World's Longest Range Smart Home Detector With Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required, YS7904-UC - Image 5](https://m.media-amazon.com/images/I/81JcP6Jgu2L.jpg) ## Questions & Answers **Q: Does the entire cable detect water or just the tip on the end?** A: The sensor cable of the YoLink Water Leak Sensor 2 detects water along the length of the cable. For more information, please kindly refer to the following guide http://www.yosmart.com/support/YS7904-UC/docs/instruction **Q: I plan to submerge v3 type of the sensor in the sump pump. I wonder if the "dirty" water will corrode/damage the sensor?** A: It is possible for the probe cable to get a build-up that can slow the response time, particularly slow drying (as the gunk on it might hold moisture). For this application, I recommend wiring our sensor to a float switch. It will work great, even in a dirty water environment. We do not suggest any particular model. Most of them are interchangeable by flipping the float around 180° but you want one that has closed contacts when in the water-detected/high position, for it to give you a "water detected" indication on the app. It is possible to work with the opposite (open) and get the desired response and notifications in automation settings but the app will display it as no-water when you have water at the float. Eric with YoSmart **Q: How many sensors can i "pair" with one hub? i have 3 basements that i need to monitor. or do i need a hub for each sensor?** A: 128 pairs! You will need a hub at each building, but unless you have a very large building, or a lot of RF obstructions, you should be fine with just one hub. Eric with YoSmart **Q: Will laying this cable on a conducting metal surface trigger the alarm? I.e. inside a water heater pan?** A: No, the metal will not impact its operation. Do keep in mind, the sensor body should not get wet. That has to stay outside the pan. You might consider instead our Water Leak Sensor 1. You can look at customer-submitted photos and find several instances of this sensor being placed in a water heater or air conditioner pan. https://www.amazon.com/dp/B07Z7QWJBP?ref=myi_title_dp&th=1 ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very much recommended! *by Y***V on 14 December 2024* This is only one of the line of YoLink products that we purchased and all of them are very reliable, easy to operate and recommended! This one I'm using as alert for sump pump. Hi availability, long range coverage and reliability. Various scenarios can be programmed and alarms will be received. Shareable monitoring. ### ⭐ Don't buy refund still outstanding £100 *by N***T on 22 October 2024* They do not understand a word of English ,I feel I have been transported to a hawkers stall in my home country. I had to call call to get a refund Products are equally unreliable as the people behind it. Quick money ### ⭐ No sirvió nunca se conectó *by R***T on 22 June 2025* Nunca funcionó ## Frequently Bought Together - YoLink Water Leak Sensor 2,1/4 Mile World's Longest Range Smart Home Water Leak Sensor,Water Leak Detector with Built-in Siren Up to 105dB,Works with Alexa and IFTTT-YoLink Hub Required,YS7904-UC - YoLink 10 Foot Sensor Cable Water Leak Sensor 2 --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/455122794-water-leak-sensor-2-1-4-mile-worlds-longest-range](https://www.desertcart.pt/products/455122794-water-leak-sensor-2-1-4-mile-worlds-longest-range) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-18*