Water Leak Sensors · Head to head

Aqara Water Leak Sensor T1 vs eufy Security Flood & Freeze Sensor E20

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from the official Aqara and Eufy sites.
2026 verdict
A local alarm, freeze coverage and a longer battery put the eufy Security Flood & Freeze Sensor E20 ahead of the Aqara Water Leak Sensor T1 in this matchup.
eufy Security Flood & Freeze Sensor E20
Winner
eufy Security Flood & Freeze Sensor E20
$39.99
Buy on Amazon USA
The eufy Security Flood & Freeze Sensor E20 carries a 75 dB buzzer and an alert light on the unit, freeze thresholds for cold pipes, about five years on a CR123A, and a 1.2 m probe for tight spots. The Aqara Water Leak Sensor T1 answers with a sealed IP67 body that survives submersion, a trigger at just 0.5 mm of water, and a wider ecosystem reach, since an Aqara hub carries it to HomeKit, Google Home and Matter alongside SmartThings and Home Assistant. Both need a hub, a US eufy HomeBase or a Zigbee network, and both are otherwise app-dependent for alerts. Choose the eufy Security Flood & Freeze Sensor E20 for a HomeBase home that wants an audible leak and freeze alarm, and the Aqara Water Leak Sensor T1 for a sealed, fast-triggering puck in an Aqara or Apple Home setup.
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FeatureAqara Water Leak Sensor T1eufy Security Flood & Freeze Sensor E20Winner
Price€24.99$39.99Aqara Water Leak Sensor T1
Rating4.44.2Aqara Water Leak Sensor T1
Weather ResistanceIP67IP54Aqara Water Leak Sensor T1
Battery Life2 years5 yearseufy Security Flood & Freeze Sensor E20
IntegrationsGoogle Home, Apple HomeKit, Samsung SmartThings, Home Assistant, MatterHome AssistantAqara Water Leak Sensor T1
SensorsWater LeakWater Leak, Temperatureeufy Security Flood & Freeze Sensor E20
AlertsWater Leak Alerts, Low Battery AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery Alertseufy Security Flood & Freeze Sensor E20
On Device Alert SoundNOYESeufy Security Flood & Freeze Sensor E20
On Device Alert LightNOYESeufy Security Flood & Freeze Sensor E20
ConnectivityZigbee2.4 GHz WiFiTie

What the differences mean

Local alarm

The eufy Security Flood & Freeze Sensor E20 sounds a 75 dB buzzer and blinks an LED on the unit when water is found. The Aqara Water Leak Sensor T1 has no sounder or light, so the alarm comes from the hub or from another device in your automation.

Freeze and temperature

The eufy Security Flood & Freeze Sensor E20 flags freezing risk below 4 C with five thresholds in the app. The Aqara Water Leak Sensor T1 detects water only, with no temperature or freeze alert.

Battery

The eufy Security Flood & Freeze Sensor E20 is rated about five years on a CR123A. The Aqara Water Leak Sensor T1 runs about two years on a CR2032, so it asks for a fresh cell much sooner.

Sealing

The Aqara Water Leak Sensor T1 is rated IP67, which covers full submersion, so it keeps working after the leak it reported. The eufy Security Flood & Freeze Sensor E20 is IP54, splash resistant but not built for immersion.

Reach into ecosystems

The Aqara Water Leak Sensor T1 reaches HomeKit, Google Home and Matter through an Aqara hub, plus SmartThings and Home Assistant directly. The eufy Security Flood & Freeze Sensor E20 reaches Home Assistant only through a community integration and has no Apple, Google or Matter path.

Which one to buy if

Frequently Asked Questions

Which is better overall: Aqara Water Leak Sensor T1 or eufy Security Flood & Freeze Sensor E20?

The eufy Security Flood & Freeze Sensor E20 for a eufy HomeBase home that wants a local alarm, freeze warnings, a probe and about five years of battery. The Aqara Water Leak Sensor T1 is the better pick for a sealed, fast-triggering puck in an Aqara or Apple Home setup.

What is the biggest difference between the Aqara Water Leak Sensor T1 and the eufy Security Flood & Freeze Sensor E20?

Alerting and sealing. The eufy Security Flood & Freeze Sensor E20 sounds a 75 dB buzzer and watches freezing pipes with a five year cell, while the Aqara Water Leak Sensor T1 is a silent, IP67-sealed water-only puck that triggers at about 0.5 mm.

Do the Aqara Water Leak Sensor T1 and the eufy Security Flood & Freeze Sensor E20 need a hub?

Both do. The eufy Security Flood & Freeze Sensor E20 needs a compatible US eufy HomeBase, and the Aqara Water Leak Sensor T1 needs a Zigbee hub, with an Aqara hub required for its HomeKit, Google Home and Matter paths.

Which one warns about freezing pipes?

The eufy Security Flood & Freeze Sensor E20. It flags freezing risk below 4 C with five thresholds in the app, while the Aqara Water Leak Sensor T1 detects water only.

Who should buy the Aqara Water Leak Sensor T1?

An Aqara or Apple Home household that wants a compact, fully sealed, low-cost puck to place under appliances, and can accept that the hub sounds the alarm.

Who should buy the eufy Security Flood & Freeze Sensor E20?

A home already running a US eufy HomeBase that wants a watertight disc with a loud local buzzer, a 1.2 m probe and about five years between battery changes.

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