Shelly Flood S Gen4 is a compact smart sensor that detects water leaks in time and helps prevent damage in homes and commercial spaces. It offers fast detection of water and low-conductivity liquids thanks to three stainless-steel detection pads, Wi‑Fi, Bluetooth, and Zigbee connectivity, support for the Matter standard, locally operating automation, and an approx. 2-year battery life. The IP67 rating ensures reliable operation even in more demanding conditions.
Hidden water leaks under a washing machine, dishwasher, or near a water heater can go unnoticed for a long time. Shelly Flood S Gen4 is designed to react immediately – as soon as it detects water, it sends a notification to your phone and can also trigger follow-up actions in your smart home.
Thanks to support for multiple protocols (Wi‑Fi 6, Bluetooth 5 LE, and Zigbee 3.0) and the Matter standard, you can easily integrate it into various ecosystems. The sensor is suitable not only for indoor use – it also offers a rainfall detection mode, which is useful for weather-related automations.
Main benefits:
- 3 large stainless-steel detection pads for fast response even to low-conductivity liquids (e.g., condensate)
- Instant notifications and the ability to trigger automations (e.g., closing a smart valve)
- Local automation – protection can work even without the cloud
- Two operating modes: flood detection and rainfall detection
- Three alarm profiles (Intensive, Normal, Power-saving) and a built-in buzzer
- IP67 protection and a compact design for discreet installation on a flat surface
- Compatibility with platforms such as Amazon Alexa, Google Smart Home, Samsung SmartThings, Home Assistant and the Shelly Smart Control app
Specifications
- Manufacturer
- Shelly
- Model
- Flood S Gen4
- Dimensions (H × W)
- 23 × 77 mm
- Weight
- 50 g (without battery) / 70 g (with battery)
- Mounting method
- On a flat surface
- Housing material
- Plastic
- Housing color
- White
- Ingress protection
- IP67
- Operating temperature
- From -20 °C to 40 °C
- Humidity
- 30% to 100% relative humidity
- Maximum operating altitude
- 2,000 m
- Power supply
- Battery powered
- Battery type
- 1 × CR123A (included in the package)
- Estimated operating time
- Approximately 2 years (depending on battery type, usage intensity, and network signal strength)
- Water detection
- Yes
- Wi‑Fi standard
- 802.11 b/g/n/ax
- Wi‑Fi frequency band
- 2401–2483 MHz
- Wi‑Fi maximum RF transmit power
- < 20 dBm
- Wi‑Fi range
- Up to 30 m indoors and up to 50 m outdoors (depending on local conditions)
- Bluetooth standard
- Bluetooth 5 LE
- Bluetooth frequency band
- 2402–2480 MHz
- Bluetooth maximum RF transmit power
- < 20 dBm
- Bluetooth range
- Up to 10 m indoors and up to 30 m outdoors (depending on local conditions)
- Zigbee standard
- 802.15.4
- Zigbee frequency band
- 2405–2480 MHz
- Zigbee maximum RF transmit power
- < 20 dBm
- Zigbee range
- Up to 100 m indoors and up to 300 m outdoors (depending on local conditions)
- Processor
- ESP-Shelly-C68F
- Flash memory
- 8 MB
- Schedules
- No
- Webhooks (URL actions)
- 10, with the ability to assign 2 URL addresses to each event
- Script support
- No
- MQTT
- Yes
- UDP
- Yes
- KVS (key-value storage)
- Yes
- Package contents
- Flood sensor; CR123A battery
