Updated November 2026
Data from the official Aeotec and Arlo sites.
2026 verdict
Parked under a fridge drip, the Arlo All-in-One Sensor is the water leak sensor to add when an Arlo Security System is already in the house.
It is the more affordable of the two, and it adds tilt on top of leak and freeze sensing, with Alexa and Google Home. The Aeotec Water Sensor 7 Pro is the better reviewed one, with a probe cable, a 3-year battery and Z-Wave, but it has no siren and no Alexa. The Arlo does nothing without that Arlo system. Pick the Arlo as an add-on to gear you own, and the Aeotec when the house runs Z-Wave instead.
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Connectivity
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Winner
35% OFF
$19.39
$29.99
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| Feature | Aeotec Water Sensor 7 Pro | Arlo All-in-One Sensor | Winner |
|---|---|---|---|
| Price | $29.99 | $19.39 | Arlo All-in-One Sensor |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Alexa, Samsung SmartThings | Arlo All-in-One Sensor |
| Sensors | Water Leak, Temperature | Water Leak, Temperature, Tilt | Arlo All-in-One Sensor |
| Weather Resistance | IP20 | NO | Different strengths |
| Rating | 4.1 | 4.1 | Tie |
| Warranty | 1 year | 1 year | Tie |
| Connectivity | Z-Wave | Other | Tie |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Tie |
| On Device Alert Sound | NO | NO | Tie |
| On Device Alert Light | NO | NO | Tie |
What the differences mean
Which system it belongs to
The Arlo All-in-One Sensor requires an Arlo Security System. It has no Wi-Fi, Zigbee, Z-Wave or Thread of its own. It lists Alexa, Google Home and SmartThings. Home Assistant is not documented, so do not treat that as a no or a yes. The Aeotec Water Sensor 7 Pro needs a Z-Wave hub and lists SmartThings and Home Assistant, not Alexa, Google Home or Apple Home. A fridge with neither system gets no help from either sensor.
Cable under the fridge
The Aeotec Water Sensor 7 Pro includes a sensor cable, which is how you reach a drip pan the body cannot sit in. The Arlo All-in-One Sensor has no cable. It is a small body, 38 x 15 x 61 mm, and water has to reach it. Under a fridge that usually means the Arlo sits in the drip, while the Aeotec can leave its electronics further out.
Tilt as well as water
The Arlo lists water, temperature and tilt, with freeze alerts and low-temperature alerts. The Aeotec Water Sensor 7 Pro lists water and temperature, with temperature and freeze alerts, and no tilt. Tamper on the Arlo is not documented. The Aeotec explicitly has no tamper alert. Neither has an on-device sound or light, so both rely on the system to tell you.
Battery and weather
The Aeotec is rated for 3 years on an ER14250 cell and is IP20. The Arlo uses a CR2477. Its battery life is not documented, and weather resistance is marked no, so it is an indoor sensor. Owners of the Arlo mention uneven battery life, which matches an unpublished rating better than a broken promise. Do not score the unknown life as a win for the Aeotec.
Which one to buy if
- an Arlo Security System is already installed
The Arlo All-in-One Sensor is the add-on that system expects, with leak, freeze and tilt, plus Alexa and Google Home.
- the house runs Z-Wave and you need a probe cable
The Aeotec Water Sensor 7 Pro includes the cable and joins a Z-Wave hub. The Arlo cannot join Z-Wave.
- someone might kick the sensor out from under the fridge
The Arlo All-in-One Sensor lists tilt. The Aeotec Water Sensor 7 Pro does not, so a moved Aeotec stays silent about being moved.
- you have neither an Arlo base nor a Z-Wave hub
Neither sensor works alone, but the Aeotec Water Sensor 7 Pro at least lands in Home Assistant or SmartThings once a Z-Wave hub exists. The Arlo stays tied to Arlo hardware.
$29.99
- - Price: $29.99 vs $19.39
- - Integrations: Samsung SmartThings, Home Assistant vs Google Home, Alexa, Samsung SmartThings
Winner
35% OFF
$19.39
$29.99
- + Price: $19.39
- + Integrations: Google Home, Alexa, Samsung SmartThings
- + Sensors: Water Leak, Temperature, Tilt
What owners say
Owners of the Aeotec Water Sensor 7 Pro praise sensitive detection and a probe cable that reaches a heater pan or a tight gap, plus Home Assistant and SmartThings after Z-Wave pairing. They complain about a fiddly pair sequence on some hubs and about probe corrosion if the tip stays wet. Owners of the Arlo All-in-One Sensor praise a small sensor that has caught a real bathroom leak before it spread, and setup they describe as quick in the Arlo app on one coin cell. They complain that the sensor is inert without an Arlo Security System, that there is no probe cable, and that battery life and the occasional false status have been uneven.
Frequently Asked Questions
Which is better under a fridge: the Aeotec Water Sensor 7 Pro or the Arlo All-in-One Sensor?
The Arlo All-in-One Sensor if you already have an Arlo Security System. It is more affordable and adds tilt, Alexa and Google Home. The Aeotec Water Sensor 7 Pro if you run Z-Wave and want the included probe cable plus a documented 3-year battery. It is the better reviewed of the two and has no local siren, same as the Arlo.
Does the Arlo All-in-One Sensor work without an Arlo hub?
No. Connectivity is listed as an Arlo Security System required, with no standalone Wi-Fi, Zigbee, Z-Wave or Thread. The Aeotec Water Sensor 7 Pro is the Z-Wave sensor, and it needs a Z-Wave hub instead.
Which one includes a sensor cable?
The Aeotec Water Sensor 7 Pro. The Arlo All-in-One Sensor does not, so it cannot probe a pan the body cannot reach.
Do both water leak sensors warn about freezing?
Yes. The Aeotec Water Sensor 7 Pro lists temperature and freeze alerts. The Arlo All-in-One Sensor lists freeze alerts and low-temperature alerts, and it also lists tilt, which the Aeotec does not.
Who should buy the Aeotec Water Sensor 7 Pro instead of the Arlo?
Z-Wave, Home Assistant or SmartThings households that want a probe cable and do not own an Arlo Security System. Alexa and Google Home are not listed on the Aeotec.
Who should buy the Arlo All-in-One Sensor?
People who already have an Arlo Security System and want a small indoor sensor for leak, freeze and tilt under a fridge, sink or bathroom, with Alexa or Google Home routines.
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