Winner
7% OFF
$27.90
$29.99
166% above its lowest price of the last 6 months ($10.50)
Updated September 2026
Data from Amazon and official Arlo and Flume sites.
2026 verdict
Alerts that reach Alexa and Google Home through the Arlo system make the Arlo All-in-One Sensor the better fit of these two for an Arlo household that also wants freeze and tilt warnings.
It detects water, senses temperature and tilt, sends freeze alerts, and works with Alexa, Google Home and SmartThings, though it needs an Arlo Security System to report anything. The Flume 2 Smart Water Monitor is a different tool: it straps to the water meter, connects over 2.4 GHz Wi-Fi through its bridge and spots unusual flow anywhere on the property, with a weather-resistant meter unit and support for Google Home and Home Assistant. Neither sounds an alarm on the device, so both alert through the app. Pick the Arlo All-in-One Sensor to guard a specific spot inside an Arlo system, and the Flume 2 Smart Water Monitor to watch the whole house from the meter.
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| Feature | Arlo All-in-One Sensor | Flume 2 Smart Water Monitor | Winner |
|---|---|---|---|
| Price | $27.90 | $199.00 | Arlo All-in-One Sensor |
| Weather Resistance | NO | YES | Flume 2 Smart Water Monitor |
| Connectivity | Other | 2.4 GHz WiFi, Other | Flume 2 Smart Water Monitor |
| Integrations | Google Home, Alexa, Samsung SmartThings | Google Home, Home Assistant | Arlo All-in-One Sensor |
| Sensors | Water Leak, Temperature, Tilt | Water Leak | Arlo All-in-One Sensor |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Water Leak Alerts, Low Battery Alerts | Arlo All-in-One Sensor |
| Rating | 4.0 | 4.0 | Tie |
| On Device Alert Sound | NO | NO | Tie |
| On Device Alert Light | NO | NO | Tie |
What the differences mean
What each one watches
The Arlo All-in-One Sensor detects water where it sits, plus temperature and tilt. The Flume 2 Smart Water Monitor reads the water meter, so it notices a leak anywhere in the house but cannot say which room is wet.
What it needs
The Arlo All-in-One Sensor only works with an Arlo Security System. The Flume 2 Smart Water Monitor needs its Wi-Fi bridge plugged in indoors, within range of the meter.
Platforms
The Arlo works with Alexa, Google Home and SmartThings. The Flume works with Google Home and Home Assistant.
Freeze warnings
The Arlo All-in-One Sensor sends low temperature and freeze alerts. The Flume 2 Smart Water Monitor does not measure temperature.
Which one to buy if
- you already run an Arlo Security System
The Arlo All-in-One Sensor slots into it and alerts through the same app.
- you want to catch leaks that never reach a floor
The Flume 2 Smart Water Monitor sees unusual flow at the meter, such as a running toilet.
- you use Alexa
The Arlo works with Alexa; the Flume does not.
- you want to track your water use
Usage history and budgets are what the Flume 2 Smart Water Monitor is built for.
Winner
7% OFF
$27.90
$29.99
- + Price: $27.90
- + Integrations: Google Home, Alexa, Samsung SmartThings
- + Sensors: Water Leak, Temperature, Tilt
- - Weather Resistance: NO vs YES
- - Connectivity: Other vs 2.4 GHz WiFi, Other
$199.00
- + Weather Resistance: YES
- + Connectivity: 2.4 GHz WiFi, Other
- - Price: $199.00 vs $27.90
- - Integrations: Google Home, Home Assistant vs Google Home, Alexa, Samsung SmartThings
What owners say
Owners of both describe leaks caught before they turned into real damage, and neither group expects a siren. Arlo All-in-One Sensor owners single out setup in minutes through the Arlo app and a small sensor that slots into the same system as their cameras; one credits it with stopping a bathroom leak from flooding the house. They warn about the hub dependency, batteries that drain faster than expected and occasional false tamper or offline statuses. Flume 2 Smart Water Monitor owners describe leaks no floor sensor could see, a toilet flapper leaking into the bowl or a hidden line, and enjoy reviewing any minute of past usage. Their complaints are the move to a proprietary battery pack and per-fixture reports less precise than advertised.
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.
- Arlo All-in-One Sensor
- Flume 2 Smart Water Monitor
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Frequently Asked Questions
Which is better: Arlo All-in-One Sensor or Flume 2 Smart Water Monitor?
The Arlo All-in-One Sensor for an Arlo home: it adds temperature, freeze and tilt alerts and works with Alexa, Google Home and SmartThings. The Flume 2 Smart Water Monitor is the better tool for whole-house leak and usage monitoring from the meter.
Does the Arlo water sensor need a hub?
Yes. The Arlo All-in-One Sensor needs an Arlo Security System to connect. The Flume 2 Smart Water Monitor uses its own Wi-Fi bridge instead.
What is the biggest difference between the Arlo All-in-One Sensor and the Flume 2 Smart Water Monitor?
The Arlo All-in-One Sensor detects water on the floor where it is placed, while the Flume 2 Smart Water Monitor reads the house water meter and flags unusual flow anywhere.
Do they sound an alarm?
No. Neither the Arlo All-in-One Sensor nor the Flume 2 Smart Water Monitor has an on-device siren or light; alerts arrive through the app.
Who should buy the Arlo All-in-One Sensor?
Arlo Security System owners who want leak, freeze and tilt alerts from one small sensor that also works with Alexa and Google Home.
Who should buy the Flume 2 Smart Water Monitor?
Homeowners who want one device watching the whole property from the meter, including hidden leaks and irrigation, without touching the plumbing.
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
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