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Shelly Flood Gen4 – Smart Water Leak & Rain Detection Sensor

Tested with Home Assistant
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Original price £24.99 - Original price £24.99
Original price
£24.99
£24.99 - £24.99
Current price £24.99
Availability:
Out of stock

Shelly Flood Gen4 is a battery-powered smart water leak and rain detection sensor designed to detect leaks immediately and send alerts to your smart home system or mobile device, helping prevent costly water damage.

The device includes a 2 m leak detection cable (extendable up to 150 m) and supports multi-protocol connectivity via Wi-Fi, Bluetooth, and Zigbee, with Matter certification for broad smart home compatibility including Home Assistant, Apple Home, and Google Home.

Key Features
  • Instant flood and rain detection
  • Wi-Fi, Bluetooth, and Zigbee connectivity
  • Matter-certified smart home compatibility
  • 2 m leak sensor cable (extendable to 150 m)
  • Battery-powered with up to 2 years operation
  • Three alarm modes: Intense, Normal, Economic
  • IP44-rated enclosure for environmental protection
  • Supports local automations and scenes
Use Cases

Appliance Leak Monitoring

Detect leaks under washing machines, dishwashers, boilers, and sinks.

Basement and Utility Protection

Monitor basements, garages, and plant rooms where water intrusion is common.

Remote Property Monitoring

Receive alerts from holiday homes or unattended properties if leaks occur.

What’s Included
  • Shelly Flood Gen4
  • 2 m leak sensor cable
  • 4 × AA 1.5 V batteries
  • User guide
Technical Specifications
Physical
Dimensions: 97 × 76 × 25 mm

Weight (Without Batteries): 91 g

Weight (With Batteries): 185 g

Mounting: Wall

Shell Material: Plastic

Colour: White
Environmental
Operating Temperature: −20 °C to 40 °C

Humidity: 30–70% RH

Maximum Altitude: 2000 m
Electrical
Power Supply: Battery powered

Battery Type: 4 × AA 1.5 V (included)

Estimated Battery Life: Approx. 2 years (usage dependent)
Sensors
Leak Sensor Cable Length: 2 m (included)

Maximum Extension Length: Up to 150 m

Connection Type: Dedicated leak sensor port
Connectivity – Wi-Fi
Protocol: 802.11 b/g/n/ax

RF Band: 2401–2483 MHz

Max RF Power: < 20 dBm

Range: Up to 30 m indoors, up to 50 m outdoors
Connectivity – Bluetooth
Protocol: Bluetooth 5 (LE)

RF Band: 2402–2480 MHz

Max RF Power: < 20 dBm

Range: Up to 10 m indoors, up to 30 m outdoors
Connectivity – Zigbee
Protocol: IEEE 802.15.4

RF Band: 2405–2480 MHz

Max RF Power: < 20 dBm

Range: Up to 100 m indoors, up to 300 m outdoors
Microcontroller
CPU: ESP-Shelly-C68F

Flash Memory: 8 MB
Firmware Capabilities
Schedules: No

Webhooks: 10 hooks (2 URLs per hook)

Scripting: No

MQTT: Yes

UDP: Yes

KVS: Yes
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