Water Leak Sensors · Head to head

Fibaro Flood Sensor (Z-Wave) vs Third Reality Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from the official Fibaro and Third Reality sites.
2026 verdict
Water, temperature, tilt and tamper sensing in one compact puck is what puts the Fibaro Flood Sensor (Z-Wave) ahead of the Third Reality Water Leak Sensor.
Fibaro Flood Sensor (Z-Wave)
Winner
Fibaro Flood Sensor (Z-Wave)
Currently unavailable on Amazon USA
See on Amazon USA
It carries the higher owner rating, has both an on-device sound and an alert light, and can run from an optional 12/24V DC supply with its CR123A as backup. The Third Reality Water Leak Sensor is the cheaper, longer-lasting Zigbee option, with a 120 dB alarm, about three years on two AAA cells and low-battery alerts, and it reaches Google Home and Apple Home through its own bridge. Pick the Fibaro for a Z-Wave or Home Assistant home that wants a fuller sensor set, the Third Reality for a Zigbee deployment on a budget.
vs
Third Reality Water Leak Sensor
Third Reality

Third Reality Water Leak Sensor

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$20.99
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Also sold in packs

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FeatureFibaro Flood Sensor (Z-Wave)Third Reality Water Leak SensorWinner
Rating4.34.1Fibaro Flood Sensor (Z-Wave)
Battery Life2 years3 yearsThird Reality Water Leak Sensor
IntegrationsSamsung SmartThings, Home AssistantGoogle Home, Apple HomeKit, Samsung SmartThings, Home AssistantThird Reality Water Leak Sensor
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 LightYESNOFibaro Flood Sensor (Z-Wave)
Warranty1 year1 yearTie
ConnectivityZ-WaveZigbeeTie
On Device Alert SoundYESYESTie

What the differences mean

Sensing

The Fibaro Flood Sensor (Z-Wave) detects water, temperature and tilt and sends tamper alerts, while the Third Reality Water Leak Sensor detects water only. For a device that doubles as a freeze and disturbance monitor, the Fibaro is the richer one.

On-device alert

The Third Reality Water Leak Sensor sounds a 120 dB alarm, the loudest of the pair, but has no light. The Fibaro Flood Sensor (Z-Wave) has both a sound and an alert light, though its volume is not documented, so each wins a part of this row.

Battery

The Third Reality Water Leak Sensor is rated for about three years on two AAA cells, while the Fibaro Flood Sensor (Z-Wave) runs about two years on a CR123A. The Fibaro can also take a 12/24V DC supply, which the Third Reality cannot.

Ecosystem

The Fibaro Flood Sensor (Z-Wave) pairs with a Z-Wave hub such as SmartThings or Home Assistant. The Third Reality Water Leak Sensor pairs over Zigbee with SmartThings and Home Assistant and needs a separate Smart Bridge MZ1 for direct Google Home or Apple Home support.

Price and rating

The Third Reality Water Leak Sensor is the cheaper of the two, while the Fibaro Flood Sensor (Z-Wave) carries the higher owner rating. Budget and track record point in different directions.

Which one to buy if

Winner
Fibaro

Fibaro Flood Sensor (Z-Wave)

Prime exclusive deal
Currently unavailable on Amazon USA
See on Amazon USA
  • + Rating: 4.3
  • + Sensors: Water Leak, Temperature, Tilt
  • + Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Tamper Alerts
  • - Battery Life: 2 years vs 3 years
  • - Integrations: Samsung SmartThings, Home Assistant vs Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant

What owners say

Owners of both sensors report fast, painless pairing once their hub is in place and reliable detection afterward, and both groups value the local alarm. Fibaro Flood Sensor (Z-Wave) owners single out the combined water, temperature and tilt sensing, the tamper alerts and the roughly two-year CR123A runtime, with the optional wired power appreciated by anyone who wants the battery as pure backup, though a few saw their platform misidentify the device type. Third Reality Water Leak Sensor owners praise the 120 dB alarm they can hear from another room, the quick pairing with Home Assistant and Hubitat, and the value that lets them run many units, but a few mention the raised sensing screws needing spacers for shallow water and occasional battery or connectivity trouble after a year or more.

Frequently Asked Questions

Which is better overall: Fibaro Flood Sensor (Z-Wave) or Third Reality Water Leak Sensor?

The Fibaro Flood Sensor (Z-Wave) wins on its combined water, temperature, tilt and tamper sensing, its stronger owner rating and its optional wired power. The Third Reality Water Leak Sensor is the cheaper, louder and longer-lasting pick for a Zigbee home.

What is the biggest difference between the Fibaro Flood Sensor (Z-Wave) and the Third Reality Water Leak Sensor?

The sensor set. The Fibaro Flood Sensor (Z-Wave) detects water, temperature and tilt with tamper alerts, while the Third Reality Water Leak Sensor detects water only but answers with a 120 dB local alarm.

Do the Fibaro Flood Sensor (Z-Wave) and the Third Reality Water Leak Sensor work with Alexa?

No. Neither supports Alexa natively. The Fibaro Flood Sensor (Z-Wave) works through a Z-Wave hub, and the Third Reality Water Leak Sensor needs a Zigbee hub plus a Smart Bridge MZ1 for Google Home or Apple Home.

Which sensor has the longer battery life, the Fibaro Flood Sensor (Z-Wave) or the Third Reality Water Leak Sensor?

The Third Reality Water Leak Sensor, rated for about three years on two AAA cells, against about two years on a CR123A in the Fibaro Flood Sensor (Z-Wave). The Fibaro can also run on an optional 12/24V DC supply.

Who should buy the Fibaro Flood Sensor (Z-Wave), and who should buy the Third Reality Water Leak Sensor?

Buy the Fibaro Flood Sensor (Z-Wave) for a Z-Wave home that wants water, temperature, tilt and tamper monitoring in one compact device. Buy the Third Reality Water Leak Sensor for a Zigbee home that wants a loud, affordable alarm and long battery life.

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