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Water Leak Sensors · Head to head

Fibaro Flood Sensor (Z-Wave) vs Flume 2 Smart Water Monitor

Full Smart Water Leak Sensors comparison in 2026

Updated September 2026
Data from Amazon and official Fibaro and Flume sites.
2026 verdict
A siren under the sink or a usage graph on your phone: the Fibaro Flood Sensor (Z-Wave) is the better leak sensor of the two for catching water where it lands.
Fibaro Flood Sensor (Z-Wave)
Winner
Fibaro Flood Sensor (Z-Wave)
$61.36
Buy on Amazon USACheck price
It sounds an alarm and flashes a light on the spot, measures temperature, sends freeze and tamper alerts, detects tilt and can take optional wired power. The Flume 2 Smart Water Monitor works another way: it straps to the water meter, connects over 2.4 GHz Wi-Fi through its bridge and spots unusual flow anywhere on the property, and it works with Google Home and Home Assistant with no hub. The Fibaro needs a Z-Wave hub and works with SmartThings and Home Assistant. Choose the Fibaro Flood Sensor (Z-Wave) for a Z-Wave home guarding specific spots, and the Flume 2 Smart Water Monitor for whole-house leak and usage tracking.
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FeatureFibaro Flood Sensor (Z-Wave)Flume 2 Smart Water MonitorWinner
Price$61.36$199.00Fibaro Flood Sensor (Z-Wave)
Rating4.34.0Fibaro Flood Sensor (Z-Wave)
ConnectivityZ-Wave2.4 GHz WiFi, OtherFlume 2 Smart Water Monitor
SensorsWater Leak, Temperature, TiltWater LeakFibaro Flood Sensor (Z-Wave)
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper AlertsWater Leak Alerts, Low Battery AlertsFibaro Flood Sensor (Z-Wave)
On Device Alert SoundYESNOFibaro Flood Sensor (Z-Wave)
On Device Alert LightYESNOFibaro Flood Sensor (Z-Wave)
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Home AssistantTie

What the differences mean

What each one detects

The Fibaro Flood Sensor (Z-Wave) detects water at the spot where it sits. The Flume 2 Smart Water Monitor reads the meter and notices flow anywhere in the house, but cannot say which room is wet.

Local alarm

The Fibaro sounds a siren and flashes a light. The Flume has neither, so its warnings arrive only through the app.

Connection

The Fibaro needs a Z-Wave hub. The Flume uses its own Wi-Fi bridge, which plugs into an outlet within range of the meter.

Platforms

Both work with Home Assistant. The Fibaro Flood Sensor (Z-Wave) adds SmartThings; the Flume 2 Smart Water Monitor adds Google Home.

Which one to buy if

What owners say

Owners of both describe real leaks caught early, but of different kinds. Fibaro Flood Sensor (Z-Wave) owners single out pairing in seconds on a Z-Wave hub, the temperature sensor for freeze risk near pipes and tilt and tamper alerts as an extra layer; their complaints are platforms that misidentify the sensor, no probe cable in the box and the odd unit arriving with a low battery. Flume 2 Smart Water Monitor owners describe leaks that never touched a floor, such as a toilet flapper leaking into the bowl, and enjoy the depth of usage history. They are unhappy about the switch to a proprietary battery pack and find per-fixture reports less precise than advertised, and they note every alert arrives through the app.

Price history compared

Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.

  • Fibaro Flood Sensor (Z-Wave)
  • Flume 2 Smart Water Monitor

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Frequently Asked Questions

Which is better: Fibaro Flood Sensor (Z-Wave) or Flume 2 Smart Water Monitor?

The Fibaro Flood Sensor (Z-Wave) as a leak sensor: it has a local siren and light plus temperature, freeze, tilt and tamper alerts. The Flume 2 Smart Water Monitor is the better choice for monitoring the whole house and its water use from the meter.

What is the biggest difference between the Fibaro Flood Sensor (Z-Wave) and the Flume 2 Smart Water Monitor?

The Fibaro Flood Sensor (Z-Wave) detects water on the floor where it is placed, while the Flume 2 Smart Water Monitor reads the house water meter.

Do they need a hub?

The Fibaro Flood Sensor (Z-Wave) needs a Z-Wave hub. The Flume 2 Smart Water Monitor needs only its own Wi-Fi bridge.

Which one sounds an alarm?

The Fibaro Flood Sensor (Z-Wave), with a siren and a light. The Flume 2 Smart Water Monitor alerts through the app only.

Who should buy the Fibaro Flood Sensor (Z-Wave)?

Z-Wave households on SmartThings or Home Assistant that want local alarms and freeze warnings at specific leak points.

Who should buy the Flume 2 Smart Water Monitor?

Homeowners who want whole-house leak detection and water use tracking in Google Home or Home Assistant, without plumbing work.

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