Water Leak Sensors · Head to head

Flume 2 Smart Water Monitor vs Meross Smart Water Leak Sensor

Full Smart Water Leak Sensors comparison in 2026

Data from the official Flume and Meross sites.
2026 verdict
For leaks inside the house, the Meross Smart Water Leak Sensor is the simpler and more affordable choice of this pair.
Meross Smart Water Leak Sensor
Winner
Meross Smart Water Leak Sensor
Currently unavailable on Amazon USA
See on Amazon USA
It is a small IP67 puck that pairs with Apple HomeKit, Samsung SmartThings and Home Assistant through a Meross Smart Wi-Fi Hub, and it sounds a local alarm when water touches its contacts. The Flume 2 Smart Water Monitor is a different class of device: it straps to your water meter and reads total household flow, catching hidden leaks and tracking usage for a whole property, with Google Home and Home Assistant support. What the Meross Smart Water Leak Sensor also brings is a true smart home fit the Flume lacks, including HomeKit and SmartThings. Choose the Meross Smart Water Leak Sensor for spot detection under a sink, washer or water heater, and the Flume 2 Smart Water Monitor when the worry is a leak you cannot see anywhere in the house.
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FeatureFlume 2 Smart Water MonitorMeross Smart Water Leak SensorWinner
Rating4.03.7Flume 2 Smart Water Monitor
Connectivity2.4 GHz WiFi, OtherOtherFlume 2 Smart Water Monitor
IntegrationsGoogle Home, Home AssistantApple HomeKit, Samsung SmartThings, Home AssistantMeross Smart Water Leak Sensor
On Device Alert SoundNOYESMeross Smart Water Leak Sensor
Weather ResistanceYESIP67Tie
SensorsWater LeakWater LeakTie
AlertsWater Leak Alerts, Low Battery AlertsWater Leak AlertsTie
On Device Alert LightNONOTie

What the differences mean

How it detects

The Flume 2 Smart Water Monitor clamps to the water meter and reads total flow, so it finds leaks anywhere in the property, including buried irrigation. The Meross Smart Water Leak Sensor sits where water would reach it and triggers on contact, so it reports the exact spot but only if the leak hits it.

Hub or no hub

The Meross Smart Water Leak Sensor needs a Meross Smart Wi-Fi Hub over Sub-1G, while the Flume 2 Smart Water Monitor needs an indoor bridge for its meter sensor. Either way a powered box is part of the install.

Waterproofing

The Meross Smart Water Leak Sensor is IP67, so it survives being splashed or briefly submerged under a sink. The Flume 2 Smart Water Monitor sits outdoors at the meter and is built for an in-ground pit rather than a wet floor.

Smart home platforms

The Meross Smart Water Leak Sensor covers Apple HomeKit, Samsung SmartThings and Home Assistant but not Alexa or Google Home. The Flume 2 Smart Water Monitor covers Google Home and Home Assistant and adds no HomeKit.

Local alert

The Meross Smart Water Leak Sensor has an on-device alarm around 60 dB. The Flume 2 Smart Water Monitor has no buzzer or light, so a leak is only as loud as your phone.

Which one to buy if

Flume

Flume 2 Smart Water Monitor

Prime exclusive deal
Currently unavailable on Amazon USA
See on Amazon USA
  • + Rating: 4.0
  • + Connectivity: 2.4 GHz WiFi, Other
  • - Integrations: Google Home, Home Assistant vs Apple HomeKit, Samsung SmartThings, Home Assistant
  • - On Device Alert Sound: NO vs YES
Winner
Meross

Meross Smart Water Leak Sensor

Prime exclusive deal
Currently unavailable on Amazon USA
See on Amazon USA
  • + Integrations: Apple HomeKit, Samsung SmartThings, Home Assistant
  • + On Device Alert Sound: YES
  • - Rating: 3.7 vs 4.0
  • - Connectivity: Other vs 2.4 GHz WiFi, Other

What owners say

Owners of both devices praise an alert that arrives in time. Meross Smart Water Leak Sensor owners describe smooth pairing with the hub using a conductive strip and sensors that show up immediately in Apple Home, with several saying it caught a real leak early; their complaint is the Meross hub itself dropping offline and needing a manual restart, plus an on-device alarm around 60 dB that some find too quiet. Flume 2 Smart Water Monitor owners talk about catches floor sensors cannot make, like a toilet flapper leaking into the bowl, and about reviewing any minute of any past day; they warn that the replacement battery is now a proprietary Flume pack, that per-fixture attribution falls short of the marketing, and that there is no siren at all.

Frequently Asked Questions

Which is better overall: Flume 2 Smart Water Monitor or Meross Smart Water Leak Sensor?

They solve different problems. The Meross Smart Water Leak Sensor is the better buy for spot protection under a sink or appliance and works with HomeKit and SmartThings. The Flume 2 Smart Water Monitor is the better pick when you want whole-property leak detection and usage data from the water meter.

What is the biggest difference between the Flume 2 Smart Water Monitor and the Meross Smart Water Leak Sensor?

Where they measure. The Flume 2 Smart Water Monitor reads total flow at the meter and finds leaks anywhere but not their room. The Meross Smart Water Leak Sensor detects water where it sits, so it names the spot but only if the leak reaches it.

Does the Meross Smart Water Leak Sensor need a hub?

Yes. It talks to a Meross Smart Wi-Fi Hub over Sub-1G rather than directly to Wi-Fi, and several owners recommend scheduling a periodic restart because the hub is reported to drop offline.

Does the Flume 2 Smart Water Monitor work with HomeKit?

No. It supports Google Home and Home Assistant, and the Meross Smart Water Leak Sensor is the one that adds Apple HomeKit and Samsung SmartThings.

Who should buy the Flume 2 Smart Water Monitor?

Anyone who wants to know about a leak anywhere in the property, track usage and set water budgets, and who cannot alter the plumbing to fit a valve or probe.

Who should buy the Meross Smart Water Leak Sensor?

Apple HomeKit or Home Assistant households that want an affordable, IP67 spot sensor and already own or will buy a Meross Smart Wi-Fi Hub.

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