Updated September 2026
Data from Amazon and official Centralite and Fibaro sites.
2026 verdict
Tilt, tamper, and a local siren are the extras.
The Fibaro Flood Sensor (HomeKit) wins this water leak sensor comparison as the more complete Apple Home device, with temperature, tilt, on-device sound and light, and Home Assistant beside native HomeKit. The Centralite 3-Series Water Sensor is cheaper and lasts a year longer on a CR2 cell, with freeze alerts on Zigbee for SmartThings. Fibaro can also take optional VDC power. Pick the Fibaro Flood Sensor (HomeKit) for HomeKit households that want every sensor in one puck; pick the Centralite 3-Series Water Sensor for a cheaper Zigbee freeze sensor.
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| Feature | Centralite 3-Series Water Sensor | Fibaro Flood Sensor (HomeKit) | Winner |
|---|---|---|---|
| Price | $19.95 | $43.28 | Centralite 3-Series Water Sensor |
| Rating | 3.8 | 4.1 | Fibaro Flood Sensor (HomeKit) |
| Battery Life | 3 years | 2 years | Centralite 3-Series Water Sensor |
| Sensors | Water Leak, Temperature | Water Leak, Temperature, Tilt | Fibaro Flood Sensor (HomeKit) |
| On Device Alert Sound | NO | YES | Fibaro Flood Sensor (HomeKit) |
| On Device Alert Light | NO | YES | Fibaro Flood Sensor (HomeKit) |
| Warranty | 1 year | 1 year | Tie |
| Weather Resistance | NO | NO | Tie |
| Connectivity | Zigbee | Bluetooth | Tie |
| Integrations | Samsung SmartThings, Home Assistant | Apple HomeKit, Home Assistant | Tie |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts | Tie |
- + Price: $19.95
- + Battery Life: 3 years
- - Rating: 3.8 vs 4.1
- - Sensors: Water Leak, Temperature vs Water Leak, Temperature, Tilt
Winner
- + Rating: 4.1
- + Sensors: Water Leak, Temperature, Tilt
- + On Device Alert Sound: YES
- - Price: $43.28 vs $19.95
- - Battery Life: 2 years vs 3 years
Frequently Asked Questions
Which is better overall, the Centralite 3-Series Water Sensor or the Fibaro Flood Sensor (HomeKit)?
The Fibaro Flood Sensor (HomeKit) wins overall with tilt sensing, a local siren and light, native Apple HomeKit, and optional wired power. The Centralite 3-Series Water Sensor is cheaper, lasts longer on battery, and is the Zigbee SmartThings option.
What is the biggest difference between these two water leak sensors?
The Fibaro Flood Sensor (HomeKit) is a HomeKit flood node with temperature, tilt, tamper alerts, and a local alarm. The Centralite 3-Series Water Sensor is a silent Zigbee leak-and-freeze puck for SmartThings and Home Assistant.
Can the Fibaro Flood Sensor (HomeKit) run on mains power?
Yes, it lists optional VDC power alongside a CR123A cell rated for about 2 years. The Centralite 3-Series Water Sensor is battery-only, rated for about 3 years on a CR2 cell.
Which one supports SmartThings?
The Centralite 3-Series Water Sensor lists SmartThings and Home Assistant. The Fibaro Flood Sensor (HomeKit) lists Apple HomeKit and Home Assistant, not SmartThings.
Who should buy the Fibaro Flood Sensor (HomeKit)?
Apple Home households that want leak, temperature, tilt, and a local siren in one sensor, with Home Assistant as a second path.
Who should buy the Centralite 3-Series Water Sensor?
Zigbee SmartThings users who want a cheaper leak-and-freeze puck and do not need HomeKit, tilt, or a local alarm.
Full comparison table
Compare all 33 Water Leak Sensors side by side
You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 33 Water Leak Sensors
- 36 specs compared
- 33 filters
YoLinkWater Leak Sensor 4
29% OFF$23.99$17.09
YoLinkWater Leak Sensor 1
$16.99
X-SenseWi-Fi Water Leak Detector
25% OFF$15.99$11.99
TP-LinkTapo T300
$19.99
SwitchBotWater Leak Detector
$16.99
AeotecWater Leak Sensor
$39.99
EufyWater and Freeze Sensor
$34.99
EveWater Guard
$109.95
AqaraWater Leak Sensor T1
C$36.99
ShellyFlood S Gen4
$27.99
GoveeWater Leak Detector 2
14% OFF$69.99$59.99
GoveeWater Sensor Alarm
$15.99
SwitchBotWater Leak Detector (Sensor Cable Edition)
10% OFF$19.99$17.99
FibaroFlood Sensor (Z-Wave)
$62.04
SonoffZigbee Water Leak Sensor
$14.99
AqaraWater Leak Sensor
$18.99
ShellyFlood Gen4
$39.99
EufyFlood & Freeze Sensor E20
$39.99
HeimanSmart Water Leakage Sensor
20% OFF$19.99$15.99
FibaroFlood Sensor (HomeKit)
$43.28
Door & Window SensorsFibaroDoor / Window Sensor 2
3.6(58)$50.45
Door & Window SensorsFibaroDoor / Window Sensor
3.2(58)$48.53
HubsFibaroHome Center Lite
3.4(39)$149.00
Motion SensorsFibaroFGBHMS-001
3.5(192)$56.10
PlugsFibaroWall Plug (EU)
4.5(526)
PlugsFibaroWall Plug with USB (US)
4.0(44)$51.28- Water Leak SensorsFibaro
Flood Sensor (Z-Wave)
4.3(233)$62.04 - Water Leak SensorsFibaro
Flood Sensor (HomeKit)
4.1(359)$43.28