Can you replace the batteries?

Yes, there are rubber tips on the 4 corners of the bottom, you can remove them and unscrew 4 screws and open the sensor, to replace two AAA batteries. The battery can run more than 5 years. You can search on YouTube video of how to change the YoLink water sensor's battery and can find the videos. Thanks!

Is this a dumb proprietary system or does it ingrate with smart home technologies, ie Z-wave Zigbee etc?

It is not Zigbee, WiFi or Z-Wave wireless technologies, all these wireless technologies only work for short range. The YoLink system use the longest wireless range and lower power consumption. It works with the YoLink hub and can be integrate to other system through the Alexa routines, IFTTT or YoLink's API. Thanks!

Do you have any water leak sensors that have audio as well as the app reminder? Or are these just app reminders?

These 3 pack leak sensors don't have build in audio sound. We have YoLink water leak sensor 2 which has build in sound, both them have app push notifications, emails and text message for leak alert.

What frimware version do you have on these D or E? Tx

Mine came with 030E installed. The sensors I bought previously had 030D installed and still aren't being offered the 030E update even though they are the exact same model number. I also don't know the difference between 030D and 030E as they don't seem to publish any firmware changelog that I can find.

Water Leak Sensor 1 3 Pack Ys7903

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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€ 97.85

Duties & taxes included

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Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay dry, stay connected—leak detection that’s miles ahead!

RELIABLE OFFLINE OPERATION - Patented device-to-device pairing keeps sensors active even if WiFi, internet, or power fail.
SMART ALERTS WHEREVER YOU ARE - Receive real-time SMS, email, and push notifications plus Alexa, IFTTT, and Home Assistant integration.
UNMATCHED LONG RANGE COVERAGE - LoRa tech delivers up to 1,320 feet open-air range—perfect for basements, garages, and remote spots beyond WiFi reach.
BATTERY LIFE THAT OUTLASTS MOST - Includes 2 AAA batteries per sensor, powering your peace of mind for over 5 years without replacement.
SET IT FORGET IT INSTALLATION - Quick, wireless setup means no hassle—just place near vulnerable water sources and relax.

The YoLink Water Leak Sensor 3-Pack uses industrial-grade LoRa technology to provide up to ¼ mile open-air wireless range without relying on WiFi or internet. Designed for easy installation near water-prone areas, it offers encrypted, reliable device-to-device communication that works even during power or network outages. With included batteries lasting over 5 years and smart alerts via SMS, email, and app notifications, it’s the ultimate smart home water leak detection solution requiring the YoLink Hub for full functionality.

Specifications

ASIN	B083Z5Z9HM
Battery Description	Alkaline
Best Sellers Rank	#1,964 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2 in Water Detectors & Alarms
Brand	YoLink
Color	White
Compatible Devices	YoLink Hub
Control Method	App
Customer Reviews	4.6 out of 5 stars 6,896 Reviews
Item Dimensions L x W x H	2.4"L x 2.4"W x 2.4"H
Manufacturer	YoSmart
Maximum Range	1320 feet
Mfr Part Number	YS7903-UC*3
Model Number	YS7903
Mounting Type	Tabletop Mount
Number of Batteries	6 AAA batteries required.
Number of Items	3
Power Source	Battery Powered
Product Dimensions	2.4"L x 2.4"W x 2.4"H
Sensor Technology	Water Leak Sensor Technology
UPC	750258361643
Voltage	3 volts

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€ 97.85

Duties & taxes included

In stock

Sold byAmazon FinlandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Finland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ravi S.

I loved the variety of products available. Will definitely shop again.

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Water Leak Sensor 1, 3-Pack, YS7903

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Description

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Common Questions