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Water Leak Sensors · Head to head

Aqara Water Leak Sensor vs Tapo T300

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Aqara and TP-Link sites.
2026 verdict
Siren on the sensor, or silence under the sink?
Tapo T300
Winner
Tapo T300
$16.99$19.9915% OFF
Buy on Amazon USACheck price
The Tapo T300 is the better water leak sensor of these two for most homes, because it sounds a 90 dB alarm and flashes a light right where the water is. It also works with Google Home, runs a rated 3 years on two AAAA cells and is the better reviewed of the pair. The Aqara Water Leak Sensor answers with reach into other platforms: it pairs over Zigbee, works with Home Assistant directly and reaches Apple Home, SmartThings and Matter through an Aqara hub, in a tiny 18 g body. Both are IP67 and both need a hub of their own brand for full use. Pick the Tapo T300 if you want to hear a leak without a phone in hand, and the Aqara Water Leak Sensor for an Apple Home, Aqara or Zigbee setup.
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FeatureAqara Water Leak SensorTapo T300Winner
Price$18.99$16.99Tapo T300
Rating4.24.6Tapo T300
Battery Life2 years3 yearsTapo T300
IntegrationsApple HomeKit, Samsung SmartThings, Home Assistant, MatterGoogle Home, Home AssistantAqara Water Leak Sensor
On Device Alert SoundNOYESTapo T300
On Device Alert LightNOYESTapo T300
Warranty1 year1 yearTie
Weather ResistanceIP67IP67Tie
ConnectivityZigbeeOtherTie
SensorsWater LeakWater LeakTie
AlertsWater Leak Alerts, Low Battery AlertsWater Leak Alerts, Low Battery AlertsTie

What the differences mean

Alarm on the sensor

The Tapo T300 has a 90 dB siren and a light on the sensor itself, so anyone in the house hears a leak. The Aqara Water Leak Sensor has neither and relies on its hub and your phone to tell you.

Smart home platforms

The Tapo T300 works with Google Home, with only partial Home Assistant support. The Aqara Water Leak Sensor works with Home Assistant over Zigbee and reaches Apple Home, SmartThings and Matter through an Aqara hub, but not Google Home or Alexa.

Size

At 50 x 50 x 15 mm and 18 g, the Aqara Water Leak Sensor is a coin-sized puck that fits almost anywhere. The Tapo T300 is a longer 84.5 x 46.5 x 30 mm block, still small but less discreet.

Battery

The Tapo T300 is rated for 3 years on two AAAA cells and the Aqara Water Leak Sensor for 2 years on a CR2032. Neither is a chore, but the Tapo goes longer between swaps.

Which one to buy if

Winner
TP-Link

Tapo T300

15% OFF
$16.99
$19.99
Buy on Amazon USACheck price
  • + Price: $16.99
  • + Rating: 4.6
  • + Battery Life: 3 years
  • - Integrations: Google Home, Home Assistant vs Apple HomeKit, Samsung SmartThings, Home Assistant, Matter

What owners say

Owners of both sensors agree on the essentials: detection is quick, and the hub each one needs is the part people did not plan for. Beyond that they value different things. Aqara Water Leak Sensor owners single out the tiny size that slips under a sink, a CR2032 cell that lasts two years or more, and automations that shut off a pump or feed IFTTT; their complaints are uneven pairing on non-Aqara Zigbee hubs and a few seals that failed over time. Tapo T300 owners talk about a loud on-device alarm, alerts that caught leaks in progress and months without a dropout next to their other Tapo and Kasa devices, while their warnings are about sensor and hub models that do not match outside the US and a top drip probe small enough to miss an off-centre drop.

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
  • Tapo T300

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Frequently Asked Questions

Which is better overall: Aqara Water Leak Sensor or Tapo T300?

The Tapo T300 for most homes. It has a 90 dB siren and a light on the sensor, works with Google Home and runs longer on its batteries. The Aqara Water Leak Sensor is the better fit for Apple Home, Aqara and Zigbee setups.

What is the biggest difference between the Aqara Water Leak Sensor and the Tapo T300?

Where the alarm happens. The Tapo T300 sounds and flashes on the sensor itself, while the Aqara Water Leak Sensor has no siren or light and alerts only through its hub and your phone.

Does the Tapo T300 work with Home Assistant?

Only partially. The Tapo T300 connects to a Tapo hub over a Sub-1G radio, and Home Assistant support for it is partial. The Aqara Water Leak Sensor has full Home Assistant support as a Zigbee device.

Do the Aqara Water Leak Sensor and the Tapo T300 need a hub?

Yes, both do. The Aqara Water Leak Sensor needs a Zigbee hub, and an Aqara hub for Apple Home, SmartThings and Matter. The Tapo T300 needs a Tapo hub, since it has no Wi-Fi of its own.

Who should buy the Aqara Water Leak Sensor?

Apple Home, Aqara and Home Assistant users who want a tiny, discreet Zigbee sensor and are happy to get alerts through their hub rather than a siren on the device.

Who should buy the Tapo T300?

Tapo and Kasa households, and anyone on Google Home, who want a loud local alarm and a long battery life from a sensor tucked by the water heater or washing machine.

Full comparison table

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