YoLink 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

YoLink 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

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: 455122794

Secure Transaction

Details

Colour
White
Brand
YoLink
Power Source
Battery
Compatible Devices
Tablet
Product Dimensions
6.2L x 6.2W x

📡1/4 mile LoRa range

🔔105dB built-in siren

🤖Alexa & IFTTT compatible

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

Description

💧 Stay dry, stay ahead — the ultimate water leak guardian for your smart home!

INSTANT FLOOD ALERTS - Real-time smartphone notifications plus optional siren and light triggers for immediate action.
SMART HOME INTEGRATION - Seamlessly works with Alexa and IFTTT to automate your home’s water safety ecosystem.
PLUG PROTECT SIMPLICITY - Easy wall-mount setup with included batteries—start monitoring critical spots in minutes.
VERSATILE WATER MONITORING - Track leaks, water levels, and even pet or plant water supplies with one smart sensor.
UNMATCHED LONG RANGE COVERAGE - Industry-leading 1,320 feet wireless range keeps you connected even in Wi-Fi dead zones.

The YoLink Water Leak Sensor 2 offers the world’s longest wireless range at 1/4 mile using LoRa technology, ensuring reliable monitoring in hard-to-reach areas. Featuring a powerful 105dB siren and real-time alerts via smartphone, SMS, and email, it protects your home from costly water damage. Compatible with Alexa and IFTTT, this easy-to-install sensor supports advanced automation, making it an essential smart home device for proactive water leak detection.

Specifications

Battery Description	Not Specified
Number of Batteries	2 AAA batteries required. (included)
Voltage	3 Volts
Control Method	Remote
Noise Level	105 dB
Mounting Type	Wall Mount
Maximum Range	1.32E+3 Feet
Sensor Technology	Rope Sensor
UPC	850024791091
Manufacturer	YOSMART
Country of Origin	USA
Model number	YS7904-UC
Item Weight	90 g
Product Dimensions	8.31 x 1.5 x 3.1 cm; 90 g
Batteries	2 AAA batteries required. (included)
Item model number	YS7904-UC
Item Height	3.1 Centimeters
Item Width	1.5 Centimeters
Battery type	Not Specified
Are batteries included?	Yes

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?

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

Vikram D.

The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks 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.

€ 106.81

Duties & taxes incl.

Finlandstore

Free Shipping

with PRO Membership

Free Returns

30 daysfor PRO membership users

15 dayswithout membership

Secure Transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Reema J.

Perfect platform for hard-to-find items. Delivery was prompt.

1 month ago

View all Trustpilot reviews