Shelly Flood Gen4 is a smart leak sensor with a 2-meter leak detection cable that can be extended up to 150 meters for broad coverage. It works with Wi-Fi, Bluetooth, Zigbee, and Matter, making it suitable for virtually any smart home. You can choose between Flood Detection or Rain Detection and set the alarm to Intense, Normal, or Economic. The built-in buzzer and instant notifications keep you informed without complicated installation. The sensor runs on four AA batteries (included) and lasts approximately two years, depending on use. The housing is IP44 rated and operates from -20 to 40 degrees Celsius. Compatible with Apple HomeKit, Google Home, Home Assistant, SmartThings, and MQTT.
Place the sensor where water shouldn't be and run the cable along vulnerable areas around appliances or pipes. A short length of cable under the dishwasher or washing machine catches the first drops, and with additional cable, you can easily protect the entire baseboard or a complete utility room. In the basement or garage, it monitors quiet corners where puddles form, immediately sounding a buzzer and sending a notification to your phone long before a small leak becomes a wet floor. For outdoor applications, you can use Rain mode and, together with a Shelly relay, automatically close the patio cover when it rains. If you manage a vacation home, set Economic alarm style for low battery consumption and still receive immediate notifications. Local automation remains active if the internet connection goes down, so rules like turning off a smart faucet continue to protect your home. With the compact wall mount, clear LED status indicators, and a simple web interface, installation is quick and you can stay in control from anywhere.