Shelly Flood Gen4 - smart water leak sensor 2m leak sensor with cable

Shelly Flood Gen4

Shelly Flood Gen4 is a smart water leak sensor that detects water where it shouldn't be – for example near a washing machine, dishwasher, water heater or pipework. The device sends an instant alert to your smartphone and enables automated actions in your smart home to help prevent water damage. The sensor uses an extendable leak detection cable, allowing you to monitor larger areas and pipe runs up to 150 metres. It works over Wi-Fi, Zigbee and Bluetooth and also supports the Matter standard, ensuring compatibility with a wide range of smart home platforms. The device is battery-powered, easy to install and suitable for use in homes, flats, holiday homes, offices or plant rooms. Its IP44 rating ensures reliable operation even in damp environments.

Technical specifications

Parameter	Value
Product name	Shelly Flood Gen4
Model	S4SN-0071A
Power supply	4 × AA 1.5 V batteries
Estimated battery life	up to ~2 years
Sensor cable	2 m (extendable up to 150 m)
Operating modes	Flood Detection, Rain Detection
Alarm modes	Intense, Normal, Economic
Local alarm	Built-in buzzer
Notifications	Mobile app / cloud notifications
Wi-Fi	802.11 b/g/n/ax
Bluetooth	Bluetooth 5 LE
Zigbee	IEEE 802.15.4
Wi-Fi range	up to 30 m indoors / 50 m outdoors
Bluetooth range	up to 10 m indoors / 30 m outdoors
Zigbee range	up to 100 m indoors / 300 m outdoors
Ingress protection	IP44
Operating temperature	−20 °C to +40 °C
Dimensions	97 × 76 × 25 mm
Weight	91 g (without batteries) / 185 g (with batteries)
Housing	Plastic
Processor	ESP-Shelly-C68F
Flash memory	8 MB
Integrations	Shelly Smart Control, Alexa, Google Home, Home Assistant, SmartThings
Protocols	Matter, MQTT, UDP, Webhooks

User guide: Shelly Flood Gen4 multilingual printed user and safety guide.pdf Manufacturer's website: Shelly Flood Gen4