Water Leak Sensors · Head to head

Aqara Water Leak Sensor vs Shelly Flood S Gen4

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Aqara and Shelly sites.
2026 verdict
For most buyers in 2026, Shelly Flood S Gen4 is the safer pick over Aqara Water Leak Sensor because of rating, warranty, and connectivity.
Shelly Flood S Gen4
Winner
Shelly Flood S Gen4
$27.99

Last recorded price

Buy on Amazon USA
It has the clearer edge on rating, warranty, and connectivity, and it stays ahead on integrations and on device alert sound. Aqara Water Leak Sensor is still relevant if you care most about price, but Shelly Flood S Gen4 is the stronger recommendation overall. For most setups, Shelly Flood S Gen4 is the smarter buy.
Aqara Water Leak Sensor
Aqara

Aqara Water Leak Sensor

Prime exclusive deal
$18.99
18% above its lowest price of the last 6 months ($16.14)
Lowest price of the last 6 months

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 319% OFF$39.99$49.39$13.33 per unitBuy
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FeatureAqara Water Leak SensorShelly Flood S Gen4Winner
Price$18.99$27.99Aqara Water Leak Sensor
Rating4.24.6Shelly Flood S Gen4
Warranty1 year3 yearsShelly Flood S Gen4
ConnectivityZigbee2.4 GHz WiFi, Bluetooth, ZigbeeShelly Flood S Gen4
IntegrationsApple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterShelly Flood S Gen4
On Device Alert SoundNOYESShelly Flood S Gen4
On Device Alert LightNOYESShelly Flood S Gen4
Weather ResistanceIP67IP67Tie
Battery Life2 years2 yearsTie
SensorsWater LeakWater LeakTie
AlertsWater Leak Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsTie

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.

  • Aqara Water Leak Sensor
  • Shelly Flood S Gen4

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Frequently Asked Questions

Which is better overall: Aqara Water Leak Sensor or Shelly Flood S Gen4?

Shelly Flood S Gen4 has the stronger overall profile in this comparison, especially for rating, warranty, and connectivity.

What is the biggest difference between Aqara Water Leak Sensor and Shelly Flood S Gen4?

Price is one of the clearest differences: Aqara Water Leak Sensor lists $18.99, while Shelly Flood S Gen4 lists $27.99.

Which one looks better on price?

Aqara Water Leak Sensor is listed at $18.99, while Shelly Flood S Gen4 is listed at $27.99. Aqara Water Leak Sensor (better spec).

Who should buy Aqara Water Leak Sensor?

Choose Aqara Water Leak Sensor if your priority is price and that matters more than rating.

Who should buy Shelly Flood S Gen4?

Choose Shelly Flood S Gen4 if your priority is rating and warranty and that matters more than price.

Full comparison table

Compare all 34 Water Leak Sensors side by side

You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.

  • 34 Water Leak Sensors
  • 36 specs compared
  • 33 filters
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