Water Leak Sensors · Head to head

Shelly Flood S Gen4 vs Third Reality Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Updated June 2026
Data from Amazon and official Shelly and Third Reality sites.
2026 verdict
Shelly Flood S Gen4 beats Third Reality Water Leak Sensor in 2026, with its clearest edge on warranty, weather resistance, and connectivity. The main reason it wins is warranty, weather resistance, and connectivity, and integrations and on device alert light strengthen that case. Choose Third Reality Water Leak Sensor only if battery life matters more to you than the broader advantage from Shelly Flood S Gen4. That keeps the verdict firmly in favor of Shelly Flood S Gen4.
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FeatureShelly Flood S Gen4Third Reality Water Leak SensorWinner
Warranty3 years1 yearShelly Flood S Gen4
Weather ResistanceIP67NOShelly Flood S Gen4
Battery Life2 years3 yearsThird Reality Water Leak Sensor
Connectivity2.4 GHz WiFi, Bluetooth, ZigbeeZigbeeShelly Flood S Gen4
IntegrationsGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Alexa, Apple HomeKit, Samsung SmartThings, Home AssistantShelly Flood S Gen4
On Device Alert LightYESNOShelly Flood S Gen4
SensorsWater LeakWater LeakTie
AlertsWater Leak Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsTie
On Device Alert SoundYESYESTie

Frequently Asked Questions

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

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

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

Warranty is one of the clearest differences: Shelly Flood S Gen4 lists 3 years, while Third Reality Water Leak Sensor lists 1 year.

Who should buy Shelly Flood S Gen4?

Choose Shelly Flood S Gen4 if your priority is warranty and weather resistance and that matters more than battery life.

Who should buy Third Reality Water Leak Sensor?

Choose Third Reality Water Leak Sensor if your priority is battery life and that matters more than warranty.

Full comparison table

Compare all 32 Water Leak Sensors side by side

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