---
product_id: 263333438
title: "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"
brand: "yolink"
price: "S/.169"
currency: PEN
in_stock: true
category: "Yo Link"
url: https://www.desertcart.pe/products/263333438-water-leak-sensor-2-1-4-mile-worlds-longest-range
store_origin: PE
region: Peru
---

# 1/4 mile LoRa range 2+ year battery life 105dB built-in siren 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

**Brand:** yolink
**Price:** S/.169
**Availability:** ✅ In Stock

## Summary

> 🚨 Stay dry, stay smart—detect leaks before they flood your day!

## Quick Answers

- **What is this?** 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 by yolink
- **How much does it cost?** S/.169 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pe](https://www.desertcart.pe/products/263333438-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

- • **Loud & Clear Alerts:** Built-in 105dB siren guarantees you’ll hear leak warnings instantly, preventing costly water damage.
- • **Reliable Power Independence:** 2+ years of battery life with device-to-device pairing ensures leak alerts even during power or internet outages.
- • **Customizable Sensing Coverage:** 4.2 ft rope-style sensor cable with extendable options to protect tight spots like under dishwashers or around water heaters.
- • **Effortless Setup & Integration:** Scan & Play QR-code app setup plus Alexa and IFTTT compatibility for seamless smart home control.
- • **Unmatched Long-Range Detection:** Covers up to 1/4 mile in open air—no WiFi needed, perfect for sprawling homes or remote basements.

## Overview

The YoLink Water Leak Sensor 2 offers the world’s longest-range smart leak detection with a 1/4 mile LoRa wireless signal, 2+ years battery life, and a powerful 105dB siren. It operates independently of WiFi or power outages via patented device-to-device pairing, features a flexible 4.2 ft sensing cable for precise coverage, and integrates smoothly with Alexa and IFTTT. Ideal for professionals and smart home enthusiasts seeking reliable, proactive water damage prevention.

## Description

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: desertcart.com: Industrial & Scientific

## Features

- STATE-OF-THE-ART Smart Water Leak Detection: LoRa-based 1/4 mile 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 | #8,945 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #14 in Water Detectors & Alarms |
| Brand Name | YoLink |
| Customer Reviews | 4.5 4.5 out of 5 stars (928) |
| Item Dimensions | 3.27 x 0.59 x 1.22 inches |
| Manufacturer | YOSMART |
| Material Type | Plastic |
| Maximum Supply Voltage | 3 Volts (DC) |
| Measuring Range | 32°F - 122°F |
| Model | YS7904-UC |
| Mounting Type | Wall Mount |
| Output Type | Digital |
| Part Number | YS7904-UC |
| Sensing Distance | 0.25 Miles |
| Smart Home Compatibility | Smart Home Compatible |
| Specific Uses For Product | Amateur, Inside, Professional |
| Style Name | Without Hub |
| UPC | 850024791091 |
| Unit Count | 1.0 Count |
| Upper Temperature Rating | 122 Degrees Fahrenheit |
| 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 (DC)
- **Style:** Without Hub

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51xkkGlZDWL.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

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*Product available on Desertcart Peru*
*Store origin: PE*
*Last updated: 2026-07-17*