Is there any way to use the water leak sensor without buying an hub? I have Amazon Echo, would that work?

Sorry, no. YoLink Hub is required to set up YoLink Smart Water Leak Sensor. You can order YoLink Smart Hub from the link https://www.amazon.com/dp/B07TQLKQLJ or you can order our Smart Home Security Start kit which includes this Smart Leak Sensor, Link: https://www.amazon.com/dp/B07V246GCX

Is there an audible water leak alarm without using the app? Onboard alarm?

1. For the waterproof function of the product, we do not have a sound function for YoLink Smart Water Leak Sensor; 2. We will release a YoLink Siren soon which can connect multiple YoLink water leak sensors and other YoLink safety devices, with long distance coverage and alarm even without network connection; 3. Because of the long coverage distance of YoLink products, even if there is sound in the sensors, we still can't hear it, Alerting user's Smart Phone is more important. What's more, our YoLink Siren is even more comprehensive. 4. Reduce its own sound function, which can be waterproof and lower power consumption. The battery life of YoLink Water Leak Sensor can last for more than 5 years.

can I use to turned a switched off if it detects a tank reached a level of water?

You will need a yolink outlet or a yolink wifi togle switch ( depending on the device you are wanting it to turn off ) to link the water sensor together. Then set an "if" scenario and you should be good to go.

why is there such a stark difference in battery life between water sensor 1 vs 2? version 1 is up to 5 years while version 2 only up to 2 years

Water Leak Sensor 2 has a sounder. You can optionally turn off the sounder, but since that draws current from the batteries, it is factored into the battery calculations we used. We tend to lean towards the more worse-case scenario (more frequent use, with sounder enabled) but your experience with it will vary and it could very well be closer to 4 years than 2. Eric with YoSmart

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💧 Stay dry, stay connected—without the WiFi worries!

ROCK SOLID SECURITY - No WiFi connection means zero internet exposure, with fully encrypted communication for peace of mind.
UNMATCHED LONG RANGE COVERAGE - Industry-leading ¼ mile wireless range powered by LoRa tech—perfect for basements, garages, and remote spots.
SET IT FORGET IT INSTALLATION - Instant setup with no wiring—just place near vulnerable water sources and relax.
SMART ALERTS ANYTIME ANYWHERE - Real-time leak notifications via app with optional SMS and automated calls to keep you ahead of disaster.
ULTRA LOW POWER ULTRA LONG LIFE - Runs on 2 included AAA batteries lasting up to a decade—minimal maintenance, maximum reliability.

The YoLink Water Leak Detector leverages industrial-grade LoRa technology to deliver the longest wireless range in the market (¼ mile) without relying on WiFi. Designed for easy installation near water-prone areas, it offers encrypted, secure communication with a dedicated hub, ensuring your home stays protected from leaks. Powered by 2 AAA batteries included, it boasts an impressive 2 to 10-year battery life, making it a low-maintenance, high-reliability smart home essential for proactive water damage prevention.

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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.

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Battery description	Alkaline
Number of batteries	2 AAA batteries required. (included)
Voltage	3 Volts
Control method	App
Mounting type	Wall Mount
Maximum range	4E+2 Metres
Sensor technology	Wireless Sensor
UPC	850024791480 750258361438
Manufacturer	YoSmart
Part Number	YS7903
Product Dimensions	6.1 x 6.1 x 2.2 cm; 80 g
Batteries	2 AAA batteries required. (included)
Item model number	YS7903
Item Package Quantity	1
Included Components	Batteries, Detector
Batteries included?	Yes
Batteries Required?	Yes
Battery Cell Type	Alkaline
Item Weight	80 g

Water Leak Detector, YoLink 1/4 Mile World's Longest Range Wireless Smart Water Leak Sensor, Hub Required

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