Full Smart Water Leak Sensors comparison in 2026
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| Feature | Aqara Water Leak Sensor | Flume 2 Smart Water Monitor | Winner |
|---|---|---|---|
| Rating | 4.2 | 4.0 | Aqara Water Leak Sensor |
| Connectivity | Zigbee | 2.4 GHz WiFi, Other | Flume 2 Smart Water Monitor |
| Integrations | Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Home Assistant | Aqara Water Leak Sensor |
| Local Control | YES | NO | Aqara Water Leak Sensor |
| Weather Resistance | IP67 | YES | Tie |
| Sensors | Water Leak | Water Leak | Tie |
| Alerts | Water Leak Alerts, Low Battery Alerts | Water Leak Alerts, Low Battery Alerts | Tie |
| On Device Alert Sound | NO | NO | Tie |
| On Device Alert Light | NO | NO | Tie |
The Aqara Water Leak Sensor detects water that reaches the spot where it sits. The Flume 2 Smart Water Monitor reads the meter, so it notices unusual flow anywhere in the house, even a running toilet that never wets a floor, but it cannot tell you which floor is getting wet.
The Aqara Water Leak Sensor needs a Zigbee hub. The Flume 2 Smart Water Monitor connects over 2.4 GHz Wi-Fi through its bridge, which needs a mains outlet indoors within range of the meter.
Both work with Home Assistant. The Aqara Water Leak Sensor adds Apple Home, SmartThings and Matter through an Aqara Hub; the Flume 2 Smart Water Monitor adds Google Home instead. Neither works with Alexa.
The Aqara Water Leak Sensor runs about 2 years on a CR2032 coin cell. The Flume 2 Smart Water Monitor uses a proprietary lithium pack, so a replacement comes from Flume rather than any shop.
The Aqara Water Leak Sensor sits right where water would pool and alerts the moment it gets wet.
The Flume 2 Smart Water Monitor watches flow at the meter, so a leak does not have to reach a floor to be noticed.
The Aqara Water Leak Sensor reaches Apple Home through the Aqara Hub; the Flume 2 Smart Water Monitor has no Apple Home support.
Usage history and unusual-usage alerts are what the Flume 2 Smart Water Monitor is built around, and a spot sensor measures none of it.
Owners of both products describe real catches, but of different leaks. Aqara Water Leak Sensor owners talk about an alarm that fires the moment water touches the contacts, a coin cell that lasts for years, and a small puck that disappears under a sink; they also use it to drive automations such as shutting off a pump. Flume 2 Smart Water Monitor owners describe leaks no floor sensor could have seen, a toilet flapper seeping into the bowl or a hidden line, and enjoy digging through minute-by-minute usage history. The complaints differ too: Aqara owners warn that the hub requirement catches people off guard and that pairing with non-Aqara Zigbee hubs can be inconsistent, while Flume owners are unhappy about the move to a proprietary replacement battery and find per-fixture attribution less precise than advertised.
The Aqara Water Leak Sensor is the better leak sensor for a single spot: it is IP67 sealed, lasts about 2 years on a coin cell and reaches Home Assistant, plus Apple Home, SmartThings and Matter through an Aqara Hub. The Flume 2 Smart Water Monitor is the better choice for whole-house leak and usage monitoring from the water meter.
Where they look for water. The Aqara Water Leak Sensor detects water touching it on the floor, while the Flume 2 Smart Water Monitor reads the house water meter and flags unusual flow anywhere on the property.
The Aqara Water Leak Sensor needs a Zigbee hub, and an Aqara Hub for Apple Home, SmartThings and Matter. The Flume 2 Smart Water Monitor connects through its own Wi-Fi bridge, which plugs into an outlet indoors.
No. Neither the Aqara Water Leak Sensor nor the Flume 2 Smart Water Monitor has an on-device siren or light, so alerts arrive through the app or your smart home platform.
Zigbee and Aqara households, Home Assistant users and anyone who wants a small sealed sensor under each sink, washer or water heater.
Homeowners who want one device watching the whole property from the meter, including hidden leaks and irrigation lines, and who care about tracking water use in Google Home or Home Assistant.
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