Water Leak Sensors · Head to head

Shelly Flood vs YoLink Water Leak Sensor 4

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Shelly and YoLink sites.
2026 verdict
Both are leak-and-freeze sensors, but the YoLink Water Leak Sensor 4 is the one to buy of the two for most homes.
YoLink Water Leak Sensor 4
Winner
YoLink Water Leak Sensor 4
$17.09$23.9929% OFF

Last recorded price

Buy on Amazon USA
It sounds its own siren and flashes a light, is rated for 5 years on two AAA cells against 1.5 for the Shelly, and adds IP66 protection and low-battery alerts. The Shelly Flood counters with no hub at all, since it joins Wi-Fi directly, and with broader platform support: Google Home, SmartThings and Home Assistant, where the YoLink covers Home Assistant through its hub and announces its alerts on Alexa through the YoLink skill. Both measure temperature, send freeze alerts, support automations and carry a 2-year warranty. Pick the YoLink Water Leak Sensor 4 for long-life, audible protection across a large property, and the Shelly Flood for a hub-free sensor in a Google Home or SmartThings home.
Shelly Flood
Shelly

Shelly Flood

Prime exclusive deal
Lowest price of the last 6 months
10% above its lowest price of the last 6 months (€23.90)

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
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FeatureShelly FloodYoLink Water Leak Sensor 4Winner
Rating3.84.7YoLink Water Leak Sensor 4
Battery Life1.5 years5 yearsYoLink Water Leak Sensor 4
IntegrationsGoogle Home, Samsung SmartThings, Home AssistantHome AssistantShelly Flood
On Device Alert SoundNOYESYoLink Water Leak Sensor 4
On Device Alert LightNOYESYoLink Water Leak Sensor 4
Warranty2 years2 yearsTie
Connectivity2.4 GHz WiFiOtherTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie

What the differences mean

Alarm on the sensor

The YoLink Water Leak Sensor 4 has a built-in siren and light, and owners say it sounds even when the hub is down. The Shelly Flood has neither and depends on phone alerts or an automation to make noise.

Battery life

5 years on two AAA cells for the YoLink Water Leak Sensor 4, 1.5 years on a CR123A for the Shelly Flood, whose Wi-Fi radio costs power. With several sensors, the Shelly means a battery change somewhere every few months.

Hub requirement

The Shelly Flood joins 2.4 GHz Wi-Fi directly. The YoLink Water Leak Sensor 4 uses LoRa and needs a YoLink hub, which in return is what gives it reach into outbuildings.

Smart home platforms

The Shelly Flood works with Google Home, SmartThings and Home Assistant. The YoLink Water Leak Sensor 4 works with Home Assistant but not Google Home or SmartThings, and Alexa can only announce its alerts through the YoLink skill. Neither supports Apple Home or Matter.

Which one to buy if

Shelly

Shelly Flood

Prime exclusive deal

Last recorded priceFeb 6, 2026$24.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Integrations: Google Home, Samsung SmartThings, Home Assistant
  • - Rating: 3.8 vs 4.7
  • - Battery Life: 1.5 years vs 5 years
Winner
YoLink

YoLink Water Leak Sensor 4

29% OFF
Prime exclusive deal
$17.09
$23.99

Last recorded price

Buy on Amazon USA
  • + Rating: 4.7
  • + Battery Life: 5 years
  • + On Device Alert Sound: YES
  • - Integrations: Home Assistant vs Google Home, Samsung SmartThings, Home Assistant

What owners say

Owners of both use them the same way, as combined leak and temperature sensors, and both groups describe quick setup. Shelly Flood owners single out configuring it from a phone browser with no app and Home Assistant picking it up automatically. YoLink Water Leak Sensor 4 owners single out long range to garages and outbuildings, a siren that sounds even when the hub is offline, years on one set of batteries and saves from a burst water heater or washer hose. The complaints differ: Shelly owners report Wi-Fi pairing that takes several tries and sensors that fall off the network, while YoLink owners mention the separate hub and a companion app that is confusing to configure at first.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Shelly Flood
  • YoLink Water Leak Sensor 4

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Frequently Asked Questions

Which is better overall: Shelly Flood or YoLink Water Leak Sensor 4?

The YoLink Water Leak Sensor 4, for its on-device siren, 5-year rated battery life and IP66 housing. The Shelly Flood is the better pick when you want no hub or need Google Home or SmartThings support.

Do both warn about freezing temperatures?

Yes. The Shelly Flood and the YoLink Water Leak Sensor 4 both measure temperature and send freeze alerts, so either can watch pipes in a cold space as well as leaks.

Does the Shelly Flood need a hub?

No. The Shelly Flood connects directly to 2.4 GHz Wi-Fi. The YoLink Water Leak Sensor 4 needs a YoLink hub.

Which one lasts longer on batteries?

The YoLink Water Leak Sensor 4, rated for 5 years on two AAA cells, against 1.5 years on one CR123A for the Shelly Flood.

Who should buy the Shelly Flood?

Home Assistant, Google Home and SmartThings users who want a hub-free Wi-Fi leak and temperature sensor and do not mind changing batteries more often.

Who should buy the YoLink Water Leak Sensor 4?

Owners of large homes and outbuildings who want a loud local siren, leak and freeze alerts and years between battery changes, and who can add a YoLink hub.

Full comparison table

Compare all 34 Water Leak Sensors side by side

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