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Water Leak Sensors · Head to head

Aeotec Water Sensor 7 Pro vs Shelly Flood

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Aeotec and Shelly sites.
2026 verdict
For a laundry room or basement already tied into Home Assistant over Wi-Fi, the Shelly Flood is the better buy of this pair.
Shelly Flood
Winner
Shelly Flood
$24.99
Buy on Amazon USACheck price
It costs less, carries a longer warranty and joins 2.4 GHz Wi-Fi directly, reaching Google Home, Samsung SmartThings and Home Assistant with no separate hub. The Aeotec Water Sensor 7 Pro answers with a higher owner rating and a longer battery life, plus a bundled sensor cable for a spot the Shelly's bare contacts cannot reach, though it depends entirely on an existing Z-Wave hub to do anything at all. Both track temperature alongside water leaks and send freeze alerts. Choose the Shelly Flood for a hub-free Wi-Fi sensor with the wider price and integration advantage, and the Aeotec Water Sensor 7 Pro if you already run Z-Wave and want the better-rated, longer-lasting sensor with a cable in the box.
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FeatureAeotec Water Sensor 7 ProShelly FloodWinner
Price$29.99$24.99Shelly Flood
Rating4.13.6Aeotec Water Sensor 7 Pro
Warranty1 year2 yearsShelly Flood
Battery Life3 years1.5 yearsAeotec Water Sensor 7 Pro
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Samsung SmartThings, Home AssistantShelly Flood
ConnectivityZ-Wave2.4 GHz WiFiTie
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie
On Device Alert SoundNONOTie
On Device Alert LightNONOTie

What the differences mean

Radio and hub

The Shelly Flood joins 2.4 GHz Wi-Fi directly with no separate hub. The Aeotec Water Sensor 7 Pro needs a Z-Wave hub to function at all.

Extra reach

The Aeotec Water Sensor 7 Pro ships with a sensor cable for a tight or hidden spot. The Shelly Flood has no cable, detecting only at its own contacts.

Platform reach

The Shelly Flood adds Google Home on top of Samsung SmartThings and Home Assistant. The Aeotec Water Sensor 7 Pro covers SmartThings and Home Assistant only, and neither supports Apple HomeKit.

Battery life

The Aeotec Water Sensor 7 Pro is rated for about 3 years on its ER14250 cell, twice the roughly 1.5 years the Shelly Flood gets on its CR123A cell, which is not included in the box.

Warranty

The Shelly Flood is covered for 2 years against 1 year on the Aeotec Water Sensor 7 Pro.

Which one to buy if

What owners say

Aeotec Water Sensor 7 Pro owners write most about sensitivity, several say it catches even a small amount of moisture reliably, and about the bundled sensor cable reaching spots a bare puck could not, though a few describe a fiddly reset-and-repair sequence the first time they paired it to a hub and some report probe corrosion after months of submerged use. Shelly Flood owners like that setup needs no app at all, just a phone browser to join Wi-Fi, and that Home Assistant picks the sensor up automatically once it is online, but the most common complaint is the sensor occasionally dropping off Wi-Fi and needing to be manually reconnected, and there is no Apple HomeKit support for anyone in that ecosystem.

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.

  • Aeotec Water Sensor 7 Pro
  • Shelly Flood

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Frequently Asked Questions

Which is better overall: Aeotec Water Sensor 7 Pro or Shelly Flood?

The Shelly Flood wins overall on price, warranty and integrations, covering Google Home, SmartThings and Home Assistant over Wi-Fi with no hub. The Aeotec Water Sensor 7 Pro wins on owner rating and battery life.

What is the biggest difference between the Aeotec Water Sensor 7 Pro and the Shelly Flood?

The radio. The Aeotec Water Sensor 7 Pro uses Z-Wave and needs a Z-Wave hub, while the Shelly Flood connects straight to 2.4 GHz Wi-Fi with no hub.

How long do the batteries last?

The Aeotec Water Sensor 7 Pro is rated for 3 years on an ER14250 cell. The Shelly Flood is rated for 1.5 years on a CR123A, which is not included in the box.

Do both detect freezing temperatures?

Yes. The Aeotec Water Sensor 7 Pro and the Shelly Flood both include a temperature sensor and send water leak, temperature and freeze alerts.

Who should buy the Shelly Flood?

The Shelly Flood fits anyone without a hub who wants a Wi-Fi leak and freeze sensor that works with Google Home, SmartThings and Home Assistant, with a 2 year warranty.

Who should buy the Aeotec Water Sensor 7 Pro?

The Aeotec Water Sensor 7 Pro suits a Z-Wave setup on SmartThings or Home Assistant, especially where a sensor cable and a longer battery rating help.

Full comparison table

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