Water Leak Sensors · Head to head

Aqara Water Leak Sensor vs Third Reality Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Aqara and Third Reality sites.
2026 verdict
The Third Reality Water Leak Sensor is the pick of this pair if you want an alarm you can hear without touching your phone.
Third Reality Water Leak Sensor
Winner
Third Reality Water Leak Sensor
$20.99

Last recorded price

Buy on Amazon USA
It runs about three years on two AAA cells against roughly two for the Aqara Water Leak Sensor, and its 120 dB onboard siren is the loudest part of either product. The Aqara Water Leak Sensor is the cheaper and better reviewed of the two and wins on water protection, since its IP67 body can be submerged where the Third Reality Water Leak Sensor carries no published rating, but it has no sound of its own and needs a hub to alert anyone. The Third Reality Water Leak Sensor also asks for a Zigbee hub, and its separate Smart Bridge MZ1 if you want Google Home or Apple Home. Go with the Third Reality Water Leak Sensor for a loud, local alarm in a Zigbee home, and the Aqara Water Leak Sensor for the lowest cost per protected spot.
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)
18% above its lowest price of the last 6 months (€16.99)

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 311% OFF$43.99$49.39$14.66 per unitBuy
vs
Winner
Third Reality Water Leak Sensor
Third Reality

Third Reality Water Leak Sensor

Prime exclusive deal
$20.99
50% above its lowest price of the last 6 months ($13.99)
7% above its lowest price of the last 6 months (€13.99)

Last recorded price

Buy on Amazon USA

Also sold in packs

  • Pack of 2$39.99$20.00 per unitBuy
  • Pack of 4$79.99$20.00 per unitBuy
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FeatureAqara Water Leak SensorThird Reality Water Leak SensorWinner
Price$18.99$20.99Aqara Water Leak Sensor
Rating4.24.1Aqara Water Leak Sensor
Battery Life2 years3 yearsThird Reality Water Leak Sensor
On Device Alert SoundNOYESThird Reality Water Leak Sensor
Warranty1 year1 yearTie
ConnectivityZigbeeZigbeeTie
IntegrationsApple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Apple HomeKit, Samsung SmartThings, Home AssistantTie
SensorsWater LeakWater LeakTie
AlertsWater Leak Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsTie
On Device Alert LightNONOTie

What the differences mean

On-device alarm

The Third Reality Water Leak Sensor carries a 120 dB siren that sounds at the sensor itself, so it warns anyone home even if the hub is offline. The Aqara Water Leak Sensor has no sound or light, and its alert is only as loud as the hub or automation you point at the leak.

Battery life

The Third Reality Water Leak Sensor is rated for about three years on two AAA cells, against roughly two years for the Aqara Water Leak Sensor's single CR2032. Both are long enough to forget about, but the Third Reality edges it and uses a more common battery.

Water protection

The Aqara Water Leak Sensor is IP67 rated and survives being submerged. The Third Reality Water Leak Sensor has no published weather-resistance rating, so it is best placed to detect a nearby leak rather than sat in a puddle.

Voice platform paths

The Third Reality Water Leak Sensor reaches Google Home or Apple Home only through its separate Smart Bridge MZ1, on top of a Zigbee hub. The Aqara Water Leak Sensor reaches Apple Home and Matter through an Aqara hub, so neither is a standalone voice-assistant device.

Sensing design

The Third Reality Water Leak Sensor uses raised sensing screws on its base and includes a drip attachment, and some owners add a spacer so shallow water makes contact. The Aqara Water Leak Sensor triggers on a thin film of water with its flush contacts and needs no adjustment.

Which one to buy if

What owners say

The two groups agree that pairing is painless and that the sensor keeps working after the network does not. Aqara Water Leak Sensor owners repeat how small it is and how long a CR2032 lasts, and they mention that the hub requirement and the occasional non-Aqara Zigbee quirk are the price of that. Third Reality Water Leak Sensor owners cannot stop bringing up the 120 dB alarm they hear from another room, and they praise running a dozen units on a budget, though a few describe the sensing screws sitting slightly raised so shallow puddles need a spacer, and a handful report a unit going quiet after a year.

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
  • Third Reality Water Leak Sensor

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Frequently Asked Questions

Which is better, the Aqara Water Leak Sensor or the Third Reality Water Leak Sensor?

They suit different buyers. The Third Reality Water Leak Sensor wins on its loud 120 dB local alarm and a slightly longer battery life, while the Aqara Water Leak Sensor wins on price, on owner score and on IP67 protection that survives a flood.

What is the biggest difference between the Aqara Water Leak Sensor and the Third Reality Water Leak Sensor?

The alarm. The Third Reality Water Leak Sensor sounds a 120 dB siren at the device and works locally even without a hub, while the Aqara Water Leak Sensor is silent and relies on its hub to make any noise.

Does the Third Reality Water Leak Sensor need a hub?

Yes. It needs a Zigbee hub to operate, and a separate Smart Bridge MZ1 if you want Google Home or Apple Home support on top of that.

Is the Aqara Water Leak Sensor waterproof?

Yes. The Aqara Water Leak Sensor carries an IP67 rating, so it tolerates being submerged and keeps working after the leak it reported.

Who should buy the Third Reality Water Leak Sensor?

Anyone in a Zigbee home who wants a genuinely loud alarm at the sensor itself, several units for whole-house coverage, and a battery that lasts years on easy-to-find cells.

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
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