Tapo T300 Smart Water Leak Sensor with 90 dB Alarm

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Product guide

Tapo T300 Smart Water Leak Sensor with 90 dB Alarm

The Tapo T300 Smart Water Leak Sensor detects water and provides an adjustable local alarm plus Tapo app alerts, but it requires a Tapo Hub for its smart-home connection. Its two AAA batteries and compact listed dimensions suit placement near likely leak sources, while remote notifications depend on the hub and app setup.

At a glance

Six probes on the top and bottom are claimed to detect drips and leaks.
An adjustable integrated alarm is listed at 90 dB, with one-press mute functionality.
Tapo app push notifications are claimed for leak detection and low battery.
A Tapo Hub is required for smart connectivity and can be triggered for an additional audible alert.
The listing claims IP67 protection and up to three years from two replaceable AAA batteries under standard laboratory testing conditions.

Price

$21.99Save 27%

Reference price: ~~$29.99~~

Price checked: Nov 14, 2026

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Pros and cons

Pros

Local audible alarm and app alerts provide two ways to be notified of a detected leak.
Six sensing probes on both sides are intended to detect drips as well as water reaching the underside.
The listed kit includes two AAA batteries, avoiding a separate initial battery purchase.
Customer feedback reports straightforward setup and integration with Tapo devices.

Cons

Smart-home and remote app functions require a separately available Tapo Hub.
The listed coverage is one sensor, so additional leak-prone areas require additional sensors.

Technical specifications

16 specifications

Identity
Brand	Tapo
Model	Tapo T300
Sensor technology	Sensitive sensor

Detection and alerts
Audible alarm	90 db

Connectivity and controls
Control methods listed	App
Compatible devices	Alexa, Google Home, Tapo

Power and battery
Power configuration	Battery Powered
Battery type	Alkaline
Batteries required	2 AAA batteries required. (included)

Dimensions and installation
Mounting types listed	Tabletop Mount
Dimensions listed	8.5L x 4.7W x 3H centimetres
Weight listed	0.1 kg

Protection and operating claims
Water and dust protection	IP67
Operating temperature	0ºC to 40ºC (32°F to 104°F)
Battery life claim	up to 3 years of operational lifespan under standard laboratory testing conditions. Actual battery endurance varies by environmental environment.
Detection response claim	as little as 1 second upon liquid contact

What to know before buying

Listing details to confirm

The listing describes a 90 dB alarm and claims an adjustable siren, while the technical details give only the sound level. It also gives dimensions in centimetres and inches in different sections, and the detailed compatibility and control fields do not confirm the hub-dependent connectivity described elsewhere. Confirm the selected listing's exact configuration and hub requirement before purchase. The up-to-three-year battery claim is conditional on standard laboratory testing, and actual endurance may vary.

What’s in the box

Included

Tapo T300 × 1
AAA batteries × 2
Quick Start Guide

Who is it for?

A good fit for

Tapo users who already have a compatible hub and want leak alerts in the app.
Households placing a sensor near sinks, laundry equipment, dishwashers or water heaters.
Buyers who want an audible alert at the sensor as well as remote notification options.

Less suited to

Anyone seeking a smart leak sensor that works without a hub.
Buyers needing several monitored locations from one sensor purchase.

Tapo T300 Smart Water Leak Sensor with 90 dB Alarm · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 550 ratings

5 stars77%77%
4 stars12%12%
3 stars7%7%
2 stars1%1%
1 star3%3%

Customer feedback describes the T300 as easy to set up and connect with Tapo devices, with reports of satisfactory leak detection and alarm loudness. That feedback is relevant to a sensor whose app alerts and hub alarm depend on Tapo integration, but it does not establish performance in every home. Ratings are mostly five-star, alongside a smaller spread of lower ratings, and do not explain the reasons for those ratings.

Positive themes

Customers report easy setup and connection with Tapo devices.
Customers describe the alarm as loud and report satisfaction with leak detection.

Frequently asked questions

Does the Tapo T300 require a hub?

Yes. The title says it requires a Tapo Hub, and the product description also specifies hub-dependent connectivity. The hub is not listed in the package contents.

What alerts does the Tapo T300 provide?

The listing claims an adjustable 90 dB local alarm and Tapo app push notifications for leaks and low battery. App alerts require the sensor's hub-dependent connection.

What batteries does it use?

It uses two AAA batteries, listed as included. The listing claims up to three years under standard laboratory testing conditions and says actual endurance varies.

How quickly does it detect water?

The listing claims an alert response in as little as one second after liquid contact. This is a manufacturer claim, not an independently verified result.