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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YoLink 3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3)

YoLink 3 Pack Smart Water Leak Sensor, 1/4 Mile Range, Alexa & IFTTT Compatible, App Notifications - Hub Required (YS7903-UCx3)

Product ID: 355690181

Details

Brand
YoLink
Colour
White
Compatible devices
YoLink Hub
Power source
Battery
Product dimensions
6.1L x 6.1W x

📡¼ mile LoRa range

🔋5+ years battery life

🔒Encrypted device-to-device

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28988 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay leak-proof, stress-free, and always connected—without WiFi worries!

BATTERY POWER THAT LASTS - Includes replaceable AAA batteries with over 5 years of continuous monitoring—no frequent replacements needed.
RESILIENT OFFLINE OPERATION - Operates independently of WiFi, internet, or power outages thanks to patented Control-D2D pairing.
UNMATCHED LONG RANGE COVERAGE - LoRa tech delivers up to 1,320 feet of reliable, WiFi-free connectivity—even through walls and basements.
SEAMLESS SMART HOME INTEGRATION - Works effortlessly with Alexa, IFTTT, and the YoLink Hub for real-time app alerts and automation.
SET IT FORGET IT INSTALLATION - Instant setup with no wiring—just place near vulnerable spots and relax.

The YoLink 3 Pack Smart Water Leak Sensor uses advanced LoRa wireless technology to provide ultra-long-range, low-power, and encrypted water leak detection. Designed for easy installation and reliable operation even without WiFi or internet, it integrates with Alexa and IFTTT via the required YoLink Hub. Each sensor runs on included AAA batteries lasting over 5 years, making it a robust solution for proactive water damage prevention in homes and remote locations.

Specifications

ASIN	B083Z5Z9HM
Battery Description	Alkaline
Best Sellers Rank	575,324 in DIY & Tools ( See Top 100 in DIY & Tools ) 244 in Water Detectors
Brand	YoLink
Colour	White
Compatible Devices	YoLink Hub
Control Method	App
Customer Reviews	4.7 4.7 out of 5 stars (1,133)
Item Dimensions L x W x H	6.1L x 6.1W x 6.1H centimetres
Manufacturer	YoSmart
Maximum Range	1320 Feet
Model Number	YS7903
Mounting Type	Tabletop Mount
Number of Batteries	6 AAA batteries required.
Part Number	YS7903-UC*3
Power source	Battery Powered
Sensor Technology	Water Leak Sensor Technology
UPC	750258361643
Voltage	3 Volts

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