Winner
Updated November 2026
Data from the official Shelly and YoLink sites.
2026 verdict
Buy the Shelly Flood Gen4 when you want Matter, a probe cable and temperature rather than only long-range silence.
This water leak sensor lists Wi-Fi, Bluetooth, Zigbee, Matter, a 2 m cable, freeze alerts, a siren and a 3-year warranty. The YoLink Water Leak Sensor 1 is the reach play: LoRa to a YoLink hub, IP68, a light but no siren, and two AAA cells rated for 5 years. Choose the Shelly Flood Gen4 when the sensor should do more than ping a hub, and the YoLink Water Leak Sensor 1 when the attic is too far for Wi-Fi and silence is acceptable.
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The biggest differences
Where these two are furthest apart, and by how much.
- Battery Life2.5×YoLink Water Leak Sensor 15 years vs 2 years
- Warranty+50%Shelly Flood Gen43 years vs 2 years
| Feature | Shelly Flood Gen4 | YoLink Water Leak Sensor 1 | Winner |
|---|---|---|---|
| Price | $39.99 | $16.99 | YoLink Water Leak Sensor 1 |
| Rating | 4.1 | 4.6 | YoLink Water Leak Sensor 1 |
| Warranty | 3 years | 2 years | Shelly Flood Gen4 |
| Weather Resistance | IP44 | IP68 | YoLink Water Leak Sensor 1 |
| Battery Life | 2 years | 5 years | YoLink Water Leak Sensor 1 |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Zigbee | Other | Shelly Flood Gen4 |
| Integrations | Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Home Assistant | Shelly Flood Gen4 |
| Sensors | Water Leak, Temperature | Water Leak | Shelly Flood Gen4 |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Water Leak Alerts, Low Battery Alerts | Shelly Flood Gen4 |
| On Device Alert Sound | YES | NO | Shelly Flood Gen4 |
| On Device Alert Light | YES | YES | Tie |
What the differences mean
Cable, siren, temperature
The Shelly Flood Gen4 includes a 2 m cable, a buzzer, a light, and temperature plus freeze alerts. The YoLink Water Leak Sensor 1 has no cable, no siren and no temperature sensor. It does have a status light. Hearing the leak, or sensing a freeze, is a Shelly feature.
How far the radio goes
The YoLink Water Leak Sensor 1 uses LoRa and needs a YoLink hub, with the write-up rating the link at up to a quarter mile in open air. The Shelly Flood Gen4 uses Wi-Fi, Bluetooth or Zigbee in the house, not that long-range radio. A detached garage is the YoLink case.
Platforms
The Shelly Flood Gen4 lists Google Home, Apple Home, SmartThings, Home Assistant and Matter. The YoLink Water Leak Sensor 1 lists Home Assistant and automations, and does not list Google Home, Apple Home, SmartThings or Matter. Both mark Alexa unsupported in the spec sheet, even where a product blurb mentions Alexa.
Seal, cells, warranty
The YoLink Water Leak Sensor 1 is IP68 and rated for 5 years on two AAA cells, with a 2-year warranty. The Shelly Flood Gen4 is IP44, rated for 2 years on four AA cells, with a 3-year warranty. The YoLink survives a soaking the Shelly rating does not claim.
Which one to buy if
- you want Matter, a cable and freeze alerts together
The Shelly Flood Gen4 lists all three, plus a siren, on Wi-Fi, Bluetooth or Zigbee.
- the sensor has to live in an attic or a detached shed
LoRa to a YoLink hub is the point of the YoLink Water Leak Sensor 1, with an IP68 body and a 5-year AAA rating.
- someone should hear the leak without buying a second siren
The Shelly Flood Gen4 has a buzzer. The YoLink Water Leak Sensor 1 does not, so an audible alarm means another YoLink device.
- the puck may be submerged and then reused
IP68 on the YoLink Water Leak Sensor 1 is the soaking rating. The Shelly Flood Gen4 stops at IP44.
Winner
$39.99
- + Warranty: 3 years
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
- + Integrations: Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter
- - Price: $39.99 vs $16.99
- - Rating: 4.1 vs 4.6
15% OFF
$16.99
$19.99
- + Price: $16.99
- + Rating: 4.6
- + Weather Resistance: IP68
- - Warranty: 2 years vs 3 years
- - Connectivity: Other vs 2.4 GHz WiFi, Bluetooth, Zigbee
What owners say
Range is the line YoLink Water Leak Sensor 1 owners repeat: attics, sumps and outbuildings still reporting, alerts by app, email and text with no subscription, and years on two AAA cells. They also say the puck itself is silent, so a siren means another YoLink device, and that water has to bridge both electrodes or a single drop may not count. Shelly Flood Gen4 owners, mostly on Zigbee and Home Assistant, praise a cable that trips on one drop and a buzzer that works even if the app is closed. Wi-Fi pairing is the complaint, and a few Matter or HomeKit setups needed a button press before status refreshed.
Frequently Asked Questions
Which is better overall: Shelly Flood Gen4 or YoLink Water Leak Sensor 1?
The Shelly Flood Gen4 when a water leak sensor should include a cable, a siren, temperature and Matter. The YoLink Water Leak Sensor 1 when distance and a 5-year battery matter more, and a silent puck on a YoLink hub is acceptable.
What is the biggest difference between the Shelly Flood Gen4 and the YoLink Water Leak Sensor 1?
The Shelly Flood Gen4 is a multi-radio sensor with a 2 m cable, a buzzer and freeze alerts. The YoLink Water Leak Sensor 1 is a silent IP68 LoRa puck that needs a YoLink hub and is rated for 5 years on AAA cells.
Does the YoLink Water Leak Sensor 1 work with Apple Home or Matter like the Shelly Flood Gen4?
No. The Shelly Flood Gen4 lists Apple Home and Matter. The YoLink Water Leak Sensor 1 lists neither, nor Google Home or SmartThings. Both list Home Assistant.
Which one makes a sound by itself?
The Shelly Flood Gen4. The YoLink Water Leak Sensor 1 has a light only. Its own notes say an audible alarm means adding a YoLink siren or SpeakerHub.
Who should buy the Shelly Flood Gen4?
Home Assistant, Zigbee or Matter users who want a probe, freeze alerts and a local buzzer, and whose leak is inside ordinary radio range.
Who should buy the YoLink Water Leak Sensor 1?
Households with a YoLink hub that need sensors in far or wet places, can accept a silent puck, and do not need temperature sensing.
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