Water Leak Sensors · Head to head

Arlo All-in-One Sensor vs eufy Security Flood & Freeze Sensor E20

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Arlo and Eufy sites.
2026 verdict
More sensors and voice support give the Arlo All-in-One Sensor the win over the eufy Security Flood & Freeze Sensor E20 in this matchup.
Arlo All-in-One Sensor
Winner
Arlo All-in-One Sensor
$23.99$29.9920% OFF

Last recorded price

Buy on Amazon USA
The Arlo All-in-One Sensor covers more ground, adding tilt and temperature to water and freeze detection and working with Google Home and Alexa, which is what takes this pairing. The eufy Security Flood & Freeze Sensor E20 answers with a sealed IP54 body, a 75 dB buzzer and alert light on the unit, about five years on a CR123A, and a 1.2 m probe for tight spots. Both are hub-bound, an Arlo Security System for one and a US eufy HomeBase for the other, so neither fits a hub-free home. Choose the Arlo All-in-One Sensor for a multi-sensor node in an Arlo household, and the eufy Security Flood & Freeze Sensor E20 for a sealed, audible, long-life disc in an eufy one.
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FeatureArlo All-in-One Sensoreufy Security Flood & Freeze Sensor E20Winner
Price$23.99$39.99Arlo All-in-One Sensor
Rating4.14.2eufy Security Flood & Freeze Sensor E20
Weather ResistanceNOIP54eufy Security Flood & Freeze Sensor E20
IntegrationsGoogle Home, Alexa, Samsung SmartThingsHome AssistantArlo All-in-One Sensor
SensorsWater Leak, Temperature, TiltWater Leak, TemperatureArlo All-in-One Sensor
AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery AlertsArlo All-in-One Sensor
On Device Alert SoundNOYESeufy Security Flood & Freeze Sensor E20
On Device Alert LightNOYESeufy Security Flood & Freeze Sensor E20
ConnectivityOther2.4 GHz WiFiTie

What the differences mean

Sensors in the box

The Arlo All-in-One Sensor watches water, temperature, freeze and tilt from one node, so the same unit can warn about a cold room or a moved object. The eufy Security Flood & Freeze Sensor E20 reports water and freeze risk, but has no tilt or everyday temperature reading.

Voice and platforms

The Arlo All-in-One Sensor works with Google Home, Alexa and SmartThings, so its leaks can drive voice routines. The eufy Security Flood & Freeze Sensor E20 has none of those, reaching Home Assistant only through a community integration.

Local alarm

The eufy Security Flood & Freeze Sensor E20 sounds a 75 dB buzzer and blinks an LED on the unit when water is found. The Arlo All-in-One Sensor has no on-device sound or light, so every warning reaches you through the Arlo app.

Sealing

The eufy Security Flood & Freeze Sensor E20 carries an IP54 rating for damp utility spaces. The Arlo All-in-One Sensor has no weather resistance rating, so it is meant for indoor, dry placements.

Battery and cable

The eufy Security Flood & Freeze Sensor E20 runs about five years on a CR123A and includes a 1.2 m probe for gaps under an appliance. The Arlo All-in-One Sensor uses a CR2477 coin cell with no published life and ships without a probe.

Which one to buy if

Winner
Arlo

Arlo All-in-One Sensor

20% OFF
Prime exclusive deal
$23.99
$29.99

Last recorded price

Buy on Amazon USA
  • + Price: $23.99
  • + Integrations: Google Home, Alexa, Samsung SmartThings
  • + Sensors: Water Leak, Temperature, Tilt
  • - Rating: 4.1 vs 4.2
  • - Weather Resistance: NO vs IP54

What owners say

Owners of the Arlo All-in-One Sensor describe it doing its core job, with several reporting it caught a real leak early enough to prevent serious damage, one even crediting it with stopping a bathroom leak from flooding a house. They call pairing in the Arlo app quick and tool-free, like the fact that it runs on a single coin cell, and appreciate how it slots into the Arlo cameras they already own. A minority report batteries draining faster than expected and occasional spurious tamper or offline status flags after months of use, so the sensor is best treated as a small add-on inside the Arlo ecosystem rather than a completely unattended one.

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
  • eufy Security Flood & Freeze Sensor E20

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Frequently Asked Questions

Which is better overall: Arlo All-in-One Sensor or eufy Security Flood & Freeze Sensor E20?

The Arlo All-in-One Sensor for an Arlo household that wants water, temperature, freeze and tilt in one node with Google Home and Alexa support. The eufy Security Flood & Freeze Sensor E20 is the better pick for a eufy HomeBase home that wants a sealed disc with a loud local buzzer and a probe.

What is the biggest difference between the Arlo All-in-One Sensor and the eufy Security Flood & Freeze Sensor E20?

How much each one senses and which hub it needs. The Arlo All-in-One Sensor adds tilt and temperature behind an Arlo Security System, while the eufy Security Flood & Freeze Sensor E20 is a sealed, audible water and freeze disc behind a US eufy HomeBase.

Do the Arlo All-in-One Sensor and the eufy Security Flood & Freeze Sensor E20 need a hub?

Both do. The Arlo All-in-One Sensor requires an Arlo Security System, and the eufy Security Flood & Freeze Sensor E20 requires a compatible US eufy HomeBase.

Does the eufy Security Flood & Freeze Sensor E20 work with Alexa or Google Home?

No. The eufy Security Flood & Freeze Sensor E20 has no Alexa or Google Home path, and Apple Home, SmartThings and Matter are also unsupported. The Arlo All-in-One Sensor does support Alexa and Google Home.

Who should buy the Arlo All-in-One Sensor?

An existing Arlo Security System owner who wants one small node to watch water, freezing and tilt, and who already runs the Arlo app for cameras.

Who should buy the eufy Security Flood & Freeze Sensor E20?

A home already running a US eufy HomeBase that wants a watertight disc with a loud local buzzer, a 1.2 m probe and about five years between battery changes.

Full comparison table

Compare all 34 Water Leak Sensors side by side

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