Shelly Flood Gen4 WiFi/Zigbee Flood & Rain Sensor

The Shelly Flood Gen4 is a smart, proactive flood sensor designed to detect leaks and water intrusion before they cause costly damage. Ideal for basements, kitchens, garages, laundry rooms, and holiday homes, it alerts you the moment water appears where it shouldn’t. Its standout feature is the extendable leak sensor cable, which monitors along a surface rather than a single point, giving you broader, more reliable coverage under appliances, along pipes, or across vulnerable areas. With instant mobile alerts and local alarms, you stay informed and in control whether you’re at home or away.

Built on Shelly’s latest Gen4 platform, the Shelly Flood Gen4 offers true multiprotocol flexibility with Bluetooth, WiFi, and Zigbee, plus full Matter certification for seamless integration into any modern smart home ecosystem. It supports both Flood Detection and Rain Detection modes, making it just as useful indoors as it is for sheltered outdoor setups. Three configurable alarm styles (Intense, Normal, and Economic) let you balance audibility and battery life to suit everything from primary residences to long-term vacant properties. Battery-powered operation with included AA batteries ensures uninterrupted protection even during power outages.

• Extendable leak sensor cable (connect multiple cables for up to 150 m coverage)

• Flood and Rain Detection modes for indoor and semi-sheltered outdoor use

• Multiprotocol connectivity: Bluetooth, Wi-Fi, Zigbee, and Matter

• Instant mobile alerts plus built-in local buzzer

• Three customizable alarm styles

• Battery-powered with low maintenance operation

• IP44-rated for durable, everyday environments

• Local automations for protection even without internet

Whether it’s shutting off appliances automatically, detecting slow pipe leaks early, safeguarding a basement or garage, or protecting a remote vacation home for months at a time, the Shelly Flood Gen4 delivers dependable, flexible leak protection. It’s a simple upgrade that provides serious peace of mind 24/7, wherever water poses a risk.

Specifications

Battery

Battery type: 4 x AA 1.5V (included)

Estimated battery life: approx. 2 years (depending on batteries used, device usage, and network connection strength)

Features

Ambient working temperature: -20°C to 40°C / -5°F to 105°F

Humidity: 30% to 70% RH

Leak sensor cable: 2m, extendable (up to 150m), attaches via designated port

Connectivity

WiFi protocol: 802.11 b/g/n/ax

WiFi RF band: 2401 - 2483 МHz

WiFi max. RF power: < 20dBm

WiFi range (depending on local construction):

• up to 50m outdoors

• up to 30m indoors

Bluetooth protocol: 5 (LE)

Bluetooth RF band: 2402 - 2480 MHz

Bluetooth max. RF power: < 20dBm

Bluetooth range:

• up to 30m outdoors

• up to 10m indoors

Zigbee protocol: 802.15.4

Zigbee RF bands: 2405 to 2480 MHz

Zigbee max. RF power: < 20dBm

Zigbee range:

• up to 300m outdoors

• up to 100m indoors

Dimensions

(H x W x L): 97 x 76 x 25 mm / 3.82 x 2.99 x 0.98 inch