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.

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

ULTRA LOW MAINTENANCE POWER - Includes 6 AAA alkaline batteries lasting over 5 years—long-term protection without constant replacements.
WI FI INTERNET INDEPENDENT - Operates flawlessly even during outages with patented Control-D2D pairing—your leak alerts never miss a beat.
UNMATCHED LONG RANGE COVERAGE - LoRa tech delivers up to 1,320 feet range—perfect for basements, garages, and remote spots beyond WiFi reach.
SEAMLESS SMART HOME INTEGRATION - Works with Alexa & IFTTT for effortless automation and real-time app notifications via YoLink Hub.
SET IT FORGET IT INSTALLATION - Instant tabletop setup—no tools, no hassle, just place near vulnerable water sources and relax.

The YoLink 3 Pack Smart Water Leak Sensor uses industrial-grade LoRa technology to provide an industry-leading ¼ mile wireless range without relying on WiFi or internet. Designed for easy tabletop installation near water-prone areas, it features encrypted device-to-device communication ensuring uninterrupted alerts even during power or network failures. Compatible with Alexa and IFTTT via the required YoLink Hub, it offers smart home integration and app notifications. Powered by 6 included AAA batteries, each sensor delivers over 5 years of reliable monitoring, making it an essential, low-maintenance safeguard against water damage.

Reviews

M**L

It is US wifi not Uk

Works well once reset to Europe wifi but it would not connect with their European/UK hub without a fair amount of resetting and liaison with tech support.I was expecting this so was not a problem for me.

9.07.2024

J**.

Does not work in UK, description not clear

The hub and temperature sensors work well and are connected immediately. I purchased the 3-pack water leak sensors but did not realise the difference between UC and EC on the labels. UC does not work in the UK; you need to buy EC. I contacted tech support, but after an initial hello, I have been ghosted!

4.02.2025

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Neha S.

Excellent communication throughout the order process. Product is perfect.

2 weeks ago

Vikram D.

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

2 weeks ago

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Battery description	Alkaline
Number of batteries	6 AAA batteries required.
Voltage	3 Volts
Control method	App
Mounting type	Tabletop Mount
Maximum range	1.32E+3 Feet
Sensor technology	Water Leak Sensor Technology
UPC	750258361643
Manufacturer	YoSmart
Part Number	YS7903-UC*3
Product Dimensions	6.4 x 6.4 x 2.5 cm; 249 g
Batteries	6 AAA batteries required.
Item model number	YS7903
Item Package Quantity	1
Batteries included?	No
Batteries Required?	No
Battery Cell Type	Alkaline
Item Weight	249 g

YoLink3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3)

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