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Water Leak Sensors · Head to head

Aeotec Water Sensor 7 Pro vs Shelly Flood Gen4

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Aeotec and Shelly sites.
2026 verdict
Wanting one sensor that will talk to whichever hub you end up choosing later, the Shelly Flood Gen4 decisively beats the Aeotec Water Sensor 7 Pro in this pair.
Shelly Flood Gen4
Winner
Shelly Flood Gen4
$39.99
Buy on Amazon USACheck price
It wins on price, a longer 3-year warranty, an IP44 weatherproof body and far more connectivity. Where the Aeotec Water Sensor 7 Pro is Z-Wave only, the Shelly Flood Gen4 supports Wi-Fi, Zigbee, Bluetooth and Matter, so it slots into Home Assistant, Google Home, HomeKit or SmartThings, and it adds a built-in buzzer and LED for local alerts plus an included extendable sensor cable. The Aeotec Water Sensor 7 Pro keeps one clear advantage, a longer roughly 3-year battery life against the Shelly's 2 years on 4x AA cells, and both track temperature with freeze alerts. Choose the Shelly Flood Gen4 for multi-protocol flexibility, an onboard alarm and a cheaper price with a longer warranty; pick the Aeotec Water Sensor 7 Pro only if maximum battery life on an existing Z-Wave hub is the priority.
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FeatureAeotec Water Sensor 7 ProShelly Flood Gen4Winner
Price$29.99$39.99Aeotec Water Sensor 7 Pro
Rating4.14.2Shelly Flood Gen4
Warranty1 year3 yearsShelly Flood Gen4
Weather ResistanceIP20IP44Shelly Flood Gen4
Battery Life3 years2 yearsAeotec Water Sensor 7 Pro
ConnectivityZ-Wave2.4 GHz WiFi, Bluetooth, ZigbeeShelly Flood Gen4
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterShelly Flood Gen4
On Device Alert SoundNOYESShelly Flood Gen4
On Device Alert LightNOYESShelly Flood Gen4
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery AlertsTie

What the differences mean

Connectivity

The Shelly Flood Gen4 supports Wi-Fi, Zigbee, Bluetooth and Matter. The Aeotec Water Sensor 7 Pro is Z-Wave only.

Local alarm

The Shelly Flood Gen4 has a built-in buzzer and LED. The Aeotec Water Sensor 7 Pro has neither.

Weather resistance

The Shelly Flood Gen4 is rated IP44. The Aeotec Water Sensor 7 Pro is rated IP20, with no dedicated water protection on the housing.

Battery life

The Aeotec Water Sensor 7 Pro is rated for about 3 years on its ER14250 cell, longer than the Shelly Flood Gen4's roughly 2 years on 4x AA cells.

Warranty

The Shelly Flood Gen4 is covered for 3 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 still value how sensitive the leak detection is and how the bundled sensor cable reaches spots a bare puck cannot, but several also mention a fiddly reset-and-repair pairing sequence the first time and some report the probe corroding after months in a consistently wet spot. Shelly Flood Gen4 owners like that the on-device automations can trigger other Shelly devices directly, one describes cutting power to an aquarium pump and flashing lights red the moment a leak fires, and the cable is called out as sensitive enough to catch a single drop under a cabinet; the 3-year warranty and Shelly's general build quality come up often as reasons owners trust it for a permanent installation.

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 Gen4

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Frequently Asked Questions

Which is better overall: Aeotec Water Sensor 7 Pro or Shelly Flood Gen4?

The Shelly Flood Gen4 wins overall on price, a 3-year warranty, weatherproofing, multi-protocol connectivity (WiFi, Zigbee, Bluetooth and Matter), and an onboard buzzer and LED. The Aeotec Water Sensor 7 Pro's main advantage is a longer battery life.

What is the biggest difference between these two sensors?

Connectivity. The Shelly Flood Gen4 supports WiFi, Zigbee, Bluetooth and Matter for almost any ecosystem, while the Aeotec Water Sensor 7 Pro is limited to Z-Wave with SmartThings and Home Assistant.

Which one works with more smart home platforms?

The Shelly Flood Gen4, which reaches Home Assistant, Google Home, HomeKit and SmartThings across its protocols. The Aeotec Water Sensor 7 Pro sticks to SmartThings and Home Assistant over Z-Wave.

Which sensor lasts longer on a battery?

The Aeotec Water Sensor 7 Pro, rated for about 3 years, longer than the Shelly Flood Gen4's roughly 2 years on 4x AA cells.

Who should buy the Shelly Flood Gen4?

Buy it if you want a cheaper, multi-protocol sensor with an extendable cable, an onboard alarm, and support for WiFi, Zigbee, Bluetooth and Matter.

Who should buy the Aeotec Water Sensor 7 Pro?

Choose it if you run a Z-Wave hub and prioritize the longest battery life alongside freeze and temperature alerts and an included sensor cable.

Full comparison table

Compare all 33 Water Leak Sensors side by side

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