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—no WiFi, no worries!

POWER THAT LASTS - Includes 6 AAA alkaline batteries with over 5 years of continuous monitoring.
SET IT FORGET IT - Quick, tool-free installation near any water source for instant peace of mind.
SMART ALERTS ANYWHERE - Receive instant SMS, email, and push notifications plus Alexa & IFTTT integration.
WI FI FREE STRESS FREE - Operates independently of WiFi or internet, ensuring leak alerts even during outages.
UNMATCHED LONG RANGE COVERAGE - LoRa tech delivers up to 1,320 feet open-air range—perfect for basements, garages, and remote spots.

The YoLink Water Leak Sensor 3-Pack uses industrial-grade LoRa technology to provide ultra-long-range, encrypted water leak detection without relying on WiFi or internet. Designed for easy installation near vulnerable water sources, it sends instant alerts via SMS, email, and push notifications, integrating seamlessly with Alexa, IFTTT, and Home Assistant. Powered by 6 AAA batteries lasting over 5 years, this sensor ensures reliable flood protection even during power or network outages. A YoLink Hub is required for full functionality.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

£78.55

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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
Item Weight	8.8 ounces
Product Dimensions	2.52 x 2.52 x 0.98 inches
Item model number	YS7903
Batteries	6 AAA batteries required.
Item Package Quantity	1
Batteries Included?	No
Batteries Required?	No
Battery Cell Type	Alkaline
Description Pile	Alkaline

YoLink Water Leak Sensor 3-Pack, LoRa Up to 1/4 Mile Open-Air Range Smart Water Leak & Flood Detector, SMS/Text, Email & Push Notifications, w/Alexa, IFTTT, Home Assistant - YoLink Hub Required

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