Deliver to Switzerland

For best experience Get the App

DOWNLOAD THE APP

WE SOURCE ITEMS FROM

UAE
UK
India
USA
Japan
KOREA

Customer Services

About Us

Customer Support

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 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

Q: Does the entire cable detect water or just the tip on the end?

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?

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?

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?

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

4.5/5

Product ID: 263333438

Secure Transaction

Details

Color
White
Brand
YoLink
Power Source
Battery
Compatible Devices
Android Phone
Product Dimensions
2.44"L x x

📡1/4 mile LoRa range

🔋2+ year battery life

🚨105dB built-in siren

Description

🚨 Stay ahead of leaks with the world’s longest-range smart sensor—because your home deserves elite protection!

POWER OUTAGE PROOF - Device-to-device pairing keeps your leak alerts live without WiFi, internet, or AC power—reliability redefined.
LOUD CLEAR ALERTS - 105dB siren ensures you never miss a leak warning, protecting your home and peace of mind.
CUSTOMIZABLE SENSING COVERAGE - 4.2 ft rope sensor with extendable cables lets you tailor detection zones around dishwashers, water heaters, and tight spaces.
EFFORTLESS SETUP INTEGRATION - Scan & Play QR code app setup plus Alexa & IFTTT compatibility for seamless smart home synergy.
UNMATCHED LONG RANGE DETECTION - Covers up to 1.32K feet with LoRa tech—stay protected even in sprawling homes or remote spots.

The YoLink Water Leak Sensor 2 offers industry-leading 1/4 mile LoRa wireless range and a 2+ year battery life, ensuring continuous leak detection even during power or internet outages. Featuring a 4.2-foot rope-style sensor with extendable cables, it adapts to confined spaces and specific areas. With a powerful 105dB built-in siren and easy QR code app setup, it integrates smoothly with Alexa and IFTTT (YoLink Hub required) to deliver reliable, smart home water leak protection.

Specifications

Battery Description	Not Specified
Number of Batteries	2 AAA batteries required. (included)
Voltage	3 Volts
Control Method	App
Noise Level	105 dB
Mounting Type	Wall Mount
Maximum Range	1.32E+3 Feet
Sensor Technology	Rope Sensor
UPC	850024791091
Manufacturer	YOSMART
Part Number	YS7904-UC
Item Weight	3.17 ounces
Product Dimensions	3.27 x 0.59 x 1.22 inches
Item model number	YS7904-UC
Batteries	2 AAA batteries required. (included)
Style	Without Hub
Material	Plastic
Item Package Quantity	1
Coverage	1000 Feet(Open Air)
Switch Style	Temperature Switch
Usage	Amateur, Inside, Professional
Batteries Included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Description Pile	Not Specified
Warranty Description	2 Years

Have a Question? See What Others Asked

Does the entire cable detect water or just the tip on the end?

I plan to submerge v3 type of the sensor in the sump pump. I wonder if the "dirty" water will corrode/damage the sensor?

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?

Will laying this cable on a conducting metal surface trigger the alarm? I.e. inside a water heater pan?

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

View all Trustpilot reviews

Shop Global, Save with Desertcart

Value for Money

Competitive prices on a vast range of products

Shop Globally

Serving millions of shoppers across more than 100 countries

Enhanced Protection

Trusted payment options loved by worldwide shoppers

Customer Assurance

Trusted payment options loved by worldwide shoppers.

Desertcart App

Shop on the go, anytime, anywhere.

Fr 53

Duties & taxes incl.

Switzerlandstore

Free Shipping

with PRO Membership

Free Returns

30 daysfor PRO membership users

15 dayswithout membership