Product Price Battery Life (hours) Water Sensitivity (mm) Connection Type Alarm System Smartphone App Notifications
Shelly Flood Gen4
US
£29.54 17520 Remote notifications to mobile device

The Shelly Flood Gen4 is a battery-powered smart leak detector with a 2 m extendable sensing cable, built-in buzzer, and support for Wi-Fi, Bluetooth, Zigbee, and Matter. It suits homes, laundry rooms, basements, kitchens, garages, and holiday properties where broad coverage and remote alerts are useful.

★ Ideal for

It is especially versatile for various home setups because its 2 m cable can extend up to 150 m, it supports Wi-Fi, Bluetooth, Zigbee, and Matter, and it provides both audible alarms and mobile notifications.

YoLink Water Leak Detection Starter Kit: Hub & Four Water Leak Sensors
US
£51.70 43800 0.3 App push notification, email, SMS, SpeakerHub broadcast, and Alexa announcements
Basement Watchdog BWD-HWA Water Alarm
US
£10.11 0.79375

The BWD-HWA is a battery-operated water alarm with a 6 ft sensor wire and a loud 110 dB siren that detects as little as 1/32 in of water. It suits homeowners who need simple, low-cost leak protection near sump pumps, water heaters, sinks, toilets, or appliances.

★ Ideal for

It is versatile for various home setups because it can be placed on floors or mounted, uses a 6 ft sensor wire that can be extended up to 100 ft, detects 0.79375 mm of water, and produces a 110 dB local alarm.