--- product_id: 263333438 title: "YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G" brand: "yolink" price: "€ 52.99" currency: EUR in_stock: true category: "Yo Link" url: https://www.desertcart.be/products/263333438-yolink-water-leak-sensor-2-105-db-alarm-ys7904g store_origin: BE region: Belgium --- # 1/4 mile LoRa range 2+ year battery life 105dB built-in siren YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G **Brand:** yolink **Price:** € 52.99 **Availability:** ✅ In Stock ## Summary > 🚨 Stay dry, stay smart—leak detection that never sleeps! ## Quick Answers - **What is this?** YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G by yolink - **How much does it cost?** € 52.99 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.be](https://www.desertcart.be/products/263333438-yolink-water-leak-sensor-2-105-db-alarm-ys7904g) ## 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 - • **Power Outage Proof:** Device-to-device pairing keeps sensors live even when WiFi, internet, or power fail—reliable 24/7 peace of mind. - • **Plug & Play Smart Setup:** Scan & Play QR code app integration makes installation a breeze—no electrician needed, no outlet required. - • **Customizable Sensing Zones:** 4.2 ft rope-style sensor cable with extendable options for precise leak detection in tight or critical spots. - • **Unmatched Long-Range Detection:** LoRa wireless tech covers up to 1/4 mile—protect every corner of your property effortlessly. - • **Seamless Smart Home Integration:** Works with Alexa & IFTTT for instant alerts and automation—stay connected and in control anywhere. ## Overview The YoLink Water Leak Sensor 2 offers industry-leading 1/4 mile LoRa wireless range and a powerful 105dB siren to detect leaks early and loud. With a 2+ year battery life and patented device-to-device pairing, it remains fully operational even during WiFi or power outages. Its extendable 4.2 ft rope-style sensor cable allows precise placement in confined spaces, while easy QR code setup and Alexa/IFTTT compatibility make it a must-have for proactive smart home water protection. ## Description YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G | Cable Leak Detection, App, Email and Text Alerts, Works with Alexa/IFTTT, LoRa YoLink Protocol Up to 2034 Feet, Hub Required: desertcart.com: Industrial & Scientific ## Features - STATE-OF-THE-ART Smart Water Leak Detection: LoRa-based 2,034 feet open-air range, 2+ year battery life, no dependence on WiFi, device-to-device pairing provides functionality even with the loss of AC and/or internet! - ROPE STYLE water-sensing cable, 4.2 feet (1.2 meter) long, additional cables can be added, for detection in confined spaces, such as under a dishwasher, and for defining specific detection areas, such as encircling a water heater - THAT WAS EASY! Installs quickly and easily, thanks to Scan & Play QR-code scanner feature in the app, easy wall-mounting, and no requirement to plug the sensor into an AC outlet. - 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! - A YoLink hub is REQUIRED! This device will not operate without a Hub, not included. Please search for B09FSS95G9 for a SpeakerHub (our audio, talking hub) or B07TQLKQLJ for the original Hub ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08P1WD66X | | Best Sellers Rank | #12,830 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Water Detectors & Alarms | | Brand Name | YoLink | | Customer Reviews | 4.5 4.5 out of 5 stars (945) | | Item Dimensions | 3.27 x 0.59 x 1.22 inches | | Item Highlight | Cable Leak Detection, App, Email and Text Alerts, Works with Alexa/IFTTT, LoRa YoLink Protocol Up to 2034 Feet, Hub Required | | Manufacturer | YOSMART | | Material Type | Plastic | | Maximum Supply Voltage | 3 volts_of_direct_current | | Measuring Range | 32°F - 122°F | | Model | YS7904-UC | | Mounting Type | Wall Mount | | Number of Items | 1 | | Output Type | Digital | | Part Number | YS7904-UC | | Sensing Distance | 0.25 miles | | Specific Uses For Product | Amateur, Inside, Professional | | Style Name | Without Hub | | UPC | 850024791091 | | Unit Count | 1 Count | | Upper Temperature Rating | 122 °F | | Warranty Description | 2 Years | ## Product Details - **Brand:** YoLink - **Item dimensions L x W x H:** 3.27 x 0.59 x 1.22 inches - **Material:** Plastic - **Maximum Supply Voltage:** 3 volts_of_direct_current - **Style:** Without Hub ## Images ![YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G - Image 1](https://m.media-amazon.com/images/I/51xkkGlZDWL.jpg) ![YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G - Image 2](https://m.media-amazon.com/images/I/31QHXceEooL.jpg) ![YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G - Image 3](https://m.media-amazon.com/images/I/41TQ4wfT-NL.jpg) ![YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G - Image 4](https://m.media-amazon.com/images/I/41cz1FtYJ4L.jpg) ![YoLink Water Leak Sensor 2, 105 dB Alarm, YS7904G - Image 5](https://m.media-amazon.com/images/I/51ls8Ukan7L.jpg) ## Available Options This product comes in different **Set** options. ## 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 ## 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.be/products/263333438-yolink-water-leak-sensor-2-105-db-alarm-ys7904g](https://www.desertcart.be/products/263333438-yolink-water-leak-sensor-2-105-db-alarm-ys7904g) --- *Product available on Desertcart Belgium* *Store origin: BE* *Last updated: 2026-10-15*