Updated October 2026
Data from the official YoLink site.
2026 verdict
Silent puck or siren puck: within YoLink's own line, the YoLink Water Leak Sensor 4 is the better buy, because it adds a 105 dB alarm and freeze warnings to the same body.
It also reports low temperatures, keeps the same LoRa link, Home Assistant support and Alexa announcements through the YoLink skill, 5-year rating on two AAA cells and 2-year warranty, and is the better reviewed of the two. The YoLink Water Leak Sensor 1 stays relevant for two reasons: it is the lower priced model and it is rated IP68 against IP66, so it survives a full soaking. Both need a YoLink hub, flash a status LED and support automations. Pick the YoLink Water Leak Sensor 4 for most spots, and the YoLink Water Leak Sensor 1 for extra points where a siren elsewhere already covers you.
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| Feature | YoLink Water Leak Sensor 1 | YoLink Water Leak Sensor 4 | Winner |
|---|---|---|---|
| Price | $16.99 | $17.09 | YoLink Water Leak Sensor 1 |
| Rating | 4.6 | 4.8 | YoLink Water Leak Sensor 4 |
| Weather Resistance | IP68 | IP66 | YoLink Water Leak Sensor 1 |
| Sensors | Water Leak | Water Leak, Temperature | YoLink Water Leak Sensor 4 |
| Alerts | Water Leak Alerts, Low Battery Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | YoLink Water Leak Sensor 4 |
| On Device Alert Sound | NO | YES | YoLink Water Leak Sensor 4 |
| Warranty | 2 years | 2 years | Tie |
| Battery Life | 5 years | 5 years | Tie |
| Connectivity | Other | Other | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| On Device Alert Light | YES | YES | Tie |
What the differences mean
Alarm on the sensor
The YoLink Water Leak Sensor 4 has a 105 dB siren that sounds locally even if the hub is offline. The YoLink Water Leak Sensor 1 is silent by design: it flashes its LED and alerts your phone, and an audible alarm needs a YoLink siren or SpeakerHub.
Freeze warnings
The YoLink Water Leak Sensor 4 reports low temperatures and sends freeze alerts, so one device watches a water heater closet or crawlspace for both leaks and frozen pipes. The YoLink Water Leak Sensor 1 detects water only.
Waterproofing
The YoLink Water Leak Sensor 1 is IP68 and the YoLink Water Leak Sensor 4 IP66. Both handle wet floors; the older model is the one rated to survive being fully submerged.
Everything else
Size, weight, battery, range and platforms are the same: 62 x 62 x 24.5 mm, two AAA cells rated for 5 years, LoRa to a YoLink hub, Home Assistant with Alexa announcements through the YoLink skill, and a 2-year warranty.
Which one to buy if
- you want anyone at home to hear the leak
The YoLink Water Leak Sensor 4 has a 105 dB siren; the YoLink Water Leak Sensor 1 is silent.
- the spot is unheated and pipes can freeze
Only the YoLink Water Leak Sensor 4 sends low temperature and freeze alerts.
- you are adding many sensors and already have a YoLink siren
The lower priced YoLink Water Leak Sensor 1 can trigger that siren directly, so each extra point costs less.
- the sensor may end up fully under water, like in a sump pit
The YoLink Water Leak Sensor 1 is rated IP68, one step above the IP66 of the newer model.
15% OFF
$16.99
$19.99
- + Price: $16.99
- + Weather Resistance: IP68
- - Rating: 4.6 vs 4.8
- - Sensors: Water Leak vs Water Leak, Temperature
Winner
29% OFF
$17.09
$23.99
- + Rating: 4.8
- + Sensors: Water Leak, Temperature
- + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts
- - Price: $17.09 vs $16.99
- - Weather Resistance: IP66 vs IP68
What owners say
Owners of both YoLink sensors tell the same story first: LoRa range that reaches attics, basements and outbuildings, alerts within seconds, years on two AAA cells and real saves, from a failing water heater to a burst washing machine hose. YoLink Water Leak Sensor 1 owners single out free app, email and SMS alerts and pairing with a YoLink shutoff valve that keeps working during an outage, while they warn that it is silent, that water must bridge both electrodes, that false reports turn up now and then and that a US unit will not pair with a European hub. YoLink Water Leak Sensor 4 owners talk most about the siren sounding even when the hub is offline and about freeze warnings from the same device, and a few found the app confusing to configure at first.
Upgrading from the YoLink Water Leak Sensor 1?
Moving up from the YoLink Water Leak Sensor 1 to the YoLink Water Leak Sensor 4 adds two things: a 105 dB siren on the sensor and low temperature and freeze alerts. Range, battery life, size, platforms and warranty stay the same, and the newer one drops from IP68 to IP66. If your YoLink Water Leak Sensor 1 already triggers a YoLink siren and sits somewhere warm, there is no need to replace it; add the Sensor 4 for cold or unwatched spots.
Frequently Asked Questions
YoLink Water Leak Sensor 1 vs 4: what is the difference?
The YoLink Water Leak Sensor 4 adds a 105 dB on-device siren and low temperature and freeze alerts. The YoLink Water Leak Sensor 1 is silent and detects water only, but it is rated IP68 against IP66. Size, battery life, range and platforms are the same.
Which is better overall: YoLink Water Leak Sensor 1 or YoLink Water Leak Sensor 4?
The YoLink Water Leak Sensor 4. It does everything the YoLink Water Leak Sensor 1 does and adds a local alarm and freeze warnings, and it is the better reviewed of the two. The Sensor 1 is the cheaper way to add points to a system that already has a siren.
Does the YoLink Water Leak Sensor 4 work without the hub?
Its 105 dB siren sounds locally even if the hub is offline, but app, email and SMS alerts need a YoLink hub, as they do for the YoLink Water Leak Sensor 1.
Do the YoLink Water Leak Sensor 1 and 4 work with Alexa, Google Home or Apple Home?
Both the YoLink Water Leak Sensor 1 and the YoLink Water Leak Sensor 4 work with Home Assistant, and Alexa can announce either one's alerts through the YoLink skill. Neither supports Google Home, Apple Home, SmartThings or Matter.
Who should buy the YoLink Water Leak Sensor 1?
YoLink owners adding extra leak points where a YoLink siren or SpeakerHub already provides the sound, or spots where the sensor could be fully submerged.
Who should buy the YoLink Water Leak Sensor 4?
Anyone starting with YoLink, and anyone protecting unheated spaces such as garages, crawlspaces and cabins, who wants a loud local alarm and freeze alerts from one sensor.
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