Wirecutter

The Proteus Aquo is more customizable than any other water-leak sensor we tested. However, there’s no dedicated app, it needs to be plugged in, and it’s twice the price of our top pick.

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This sensor issues a loud alarm when water is detected and sends quick smartphone notifications. And you can silence it on the device or in the app.

This sensor issues a loud alarm when water is detected, sends quick smartphone notifications, and allows you to silence it on the device or in the app.

The D-Link water-leak sensor doesn’t react as quickly as our top pick, but it does have a loud alarm and can be integrated with Google Assistant and IFTTT.

Water Sensor Comparison