Updated July 2026
Data from Amazon and official Fibaro and Shelly sites.
2026 verdict
Multi-protocol flexibility decides this water leak sensor comparison in favor of the Shelly Flood Gen4, which pairs a lower price with a longer warranty, an IP44 weather-resistance rating, and WiFi, Bluetooth, Zigbee, and Matter connectivity that dwarfs the Fibaro Flood Sensor (Z-Wave)'s single Z-Wave radio. The Fibaro still holds an edge in raw owner satisfaction and adds more onboard sensing, water leak, temperature, and tilt detection all bundled with tamper alerts. Both sensors also monitor temperature and freeze risk alongside leaks. Pick the Shelly Flood Gen4 if you want protocol flexibility, Matter support, and a weatherproof housing at a friendlier price, and choose the Fibaro Flood Sensor (Z-Wave) if you already run Z-Wave and value its higher rating and tilt/tamper sensing.
| Feature | Fibaro Flood Sensor (Z-Wave) | Shelly Flood Gen4 | Winner |
|---|---|---|---|
| Price | $66.12 | $39.99 | Shelly Flood Gen4 |
| Rating | 4.3 | 4.2 | Fibaro Flood Sensor (Z-Wave) |
| Warranty | 1 year | 3 years | Shelly Flood Gen4 |
| Weather Resistance | NO | IP44 | Shelly Flood Gen4 |
| Connectivity | Z-Wave | 2.4 GHz WiFi, Bluetooth, Zigbee | Shelly Flood Gen4 |
| Integrations | Home Assistant | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Shelly Flood Gen4 |
| Sensors | Water Leak, Temperature, Tilt | Water Leak, Temperature | Fibaro Flood Sensor (Z-Wave) |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Fibaro Flood Sensor (Z-Wave) |
| Battery Life | 2 years | 2 years | Tie |
| On Device Alert Sound | YES | YES | Tie |
| On Device Alert Light | YES | YES | Tie |
16% OFF
$66.12
$78.53
- + Rating: 4.3
- + Sensors: Water Leak, Temperature, Tilt
- + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts
- - Price: $66.12 vs $39.99
- - Warranty: 1 year vs 3 years
Winner
$39.99
- + Price: $39.99
- + Warranty: 3 years
- + Weather Resistance: IP44
- - Rating: 4.2 vs 4.3
- - Sensors: Water Leak, Temperature vs Water Leak, Temperature, Tilt
Frequently Asked Questions
Is the Fibaro Flood Sensor (Z-Wave) or the Shelly Flood Gen4 the better water leak sensor?
The Shelly Flood Gen4 wins overall with a lower price, a longer warranty, weather resistance, and support for WiFi, Zigbee, Bluetooth, and Matter. The Fibaro Flood Sensor (Z-Wave) counters with a higher owner rating and extra tilt and tamper sensing.
What is the biggest difference between the Fibaro Flood Sensor (Z-Wave) and the Shelly Flood Gen4?
Connectivity range. The Fibaro Flood Sensor (Z-Wave) is limited to a single Z-Wave radio, while the Shelly Flood Gen4 supports WiFi, Bluetooth, Zigbee, and Matter, giving it a much wider path into different smart home ecosystems.
Which sensor is rated for damp or wet environments?
The Shelly Flood Gen4 carries an IP44 weather-resistance rating, while the Fibaro Flood Sensor (Z-Wave) has no confirmed weather rating listed.
Which one has tilt sensing and tamper alerts?
Only the Fibaro Flood Sensor (Z-Wave). It supports tilt detection paired with tamper alerts, a category the Shelly Flood Gen4 does not include.
Who should buy the Shelly Flood Gen4?
Choose it if you want a more affordable, weather-resistant sensor with the widest protocol support, WiFi, Zigbee, Bluetooth, and Matter, plus a longer warranty.
Who should buy the Fibaro Flood Sensor (Z-Wave)?
Buy it if you already run a Z-Wave hub and want the higher-rated option with built-in tilt sensing and tamper detection.
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