Updated November 2026
Data from the 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.
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.
Works with
Connectivity
vs
Winner
3% OFF
€25.40
€26.09
Works with
Connectivity
- Wi-Fi 2.4 GHz
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The biggest differences
Where these two are furthest apart, and by how much.
- Warranty2×Shelly Flood2 years vs 1 year
- Battery Life2×Aeotec Water Sensor 7 Pro3 years vs 1.5 years
| Feature | Aeotec Water Sensor 7 Pro | Shelly Flood | Winner |
|---|---|---|---|
| Price | $29.99 | €25.40 | Shelly Flood |
| Rating | 4.1 | 3.8 | Aeotec Water Sensor 7 Pro |
| Warranty | 1 year | 2 years | Shelly Flood |
| Battery Life | 3 years | 1.5 years | Aeotec Water Sensor 7 Pro |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Samsung SmartThings, Home Assistant | Shelly Flood |
| Connectivity | Z-Wave | 2.4 GHz WiFi | Tie |
| Sensors | Water Leak, Temperature | Water Leak, Temperature | Tie |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Tie |
| On Device Alert Sound | NO | NO | Tie |
| On Device Alert Light | NO | NO | Tie |
| Local Control | YES | YES | Tie |
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
- you have no smart home hub and want to join Wi-Fi directly
The Shelly Flood needs no separate hub at all, just your home Wi-Fi.
- you already run a Z-Wave mesh
It plugs straight into that ecosystem and adds a sensor cable for a hard-to-reach spot.
- you want the longer battery life and don't mind sourcing a Z-Wave hub
Its roughly 3-year rating beats the Shelly Flood's 1.5 years by a wide margin.
- Google Home is part of your setup
The Shelly Flood supports Google Home; the Aeotec Water Sensor 7 Pro does not.
- price and a longer warranty matter most
The Shelly Flood costs less and carries a 2-year warranty against Aeotec's 1 year.
$29.99
- + Rating: 4.1
- + Battery Life: 3 years
- - Price: $29.99 vs €25.40
- - Warranty: 1 year vs 2 years
Winner
3% OFF
€25.40
€26.09
- + Price: €25.40
- + Warranty: 2 years
- + Integrations: Google Home, Samsung SmartThings, Home Assistant
- - Rating: 3.8 vs 4.1
- - Battery Life: 1.5 years vs 3 years
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.
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.
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