Tapo Smart Water Leak Sensor T300

Technical details

A leak sensor is most useful when it can alert you before a small drip becomes a bigger clean-up. The Tapo T300 detects liquid using probes on both the top and bottom of its casing, with a response stated as fast as one second after contact. It also has an adjustable 90 dB siren, a one-press mute function and app notifications when a leak is detected.

Its two replaceable AAA batteries are rated for up to three years under standard laboratory testing. Actual life can vary, so treat that figure as a guide rather than a guaranteed replacement interval. The sensor is rated IP67 for dust and water protection, and the product information lists a two-year manufacturer warranty with technical support.

Practical compatibility

The T300 requires a Tapo Hub, so it is not a standalone choice for a home without one. When connected, it can also trigger the hub’s alarm, extending the audible alert beyond the sensor itself. App notifications arrive through the Tapo app, and the product is listed as working with Alexa and Google Home. Specific hub models and the exact smart-home functions available are not stated, so check those details against the system you already use before choosing it.

That hub requirement is the main trade-off compared with a basic standalone alarm. If you already use a compatible Tapo setup, the hub connection and phone alerts may be useful together, if you want a sensor that works independently, this is a less suitable approach.

Usage tips

Place it where water would collect first, such as on the floor beside a washing machine or below a sink, rather than somewhere a leak is unlikely to reach. A quick drip onto the sensor can trigger the local siren, while a phone notification is useful when you are in another room or away from home. Keep in mind that remote alerts depend on the sensor being connected to the required hub and app.

The adjustable alarm and mute button give you some control over a loud alert in a small space. The top-and-bottom sensing design also gives water more than one point of contact with the casing. It is intended to detect leaks, though it does not prevent them or replace checking plumbing and appliances.

Buying questions

Does the T300 work without a hub?

No. The product requires a Tapo Hub, which should be part of your setup before you choose this sensor.

How will it notify you about a leak?

It can sound its built-in, adjustable 90 dB alarm and send a push notification through the Tapo app. It can also trigger the connected Tapo Hub alarm.

What should you know about the batteries?

It uses two replaceable AAA batteries. The stated life is up to three years under standard laboratory testing, but real-world endurance varies.

Before you buy

It may suit you if you want a sensor for a likely leak spot and value both a nearby siren and app alerts. It won’t suit you if you need a standalone device or have no Tapo Hub, that dependency is more important to the decision than the headline detection speed. The product information also does not specify which hub models are supported, so confirm that fit with your existing setup. Choose it for added leak awareness in a connected home, not as a substitute for preventing water damage or responding to a leak.