Updated October 2026
Data from Amazon and official Aeotec and Kidde sites.
2026 verdict
The Kidde WiFi Water Leak & Freeze Detector is the simpler sensor of the two, needing no hub and sounding an alarm on the device.
It joins Wi-Fi directly, works with Google Home and Home Assistant and covers water, temperature and freezing pipes for less money. The Aeotec Water Sensor 7 Pro answers with a Z-Wave hub path, a sensor cable for tight spots and about three years on an ER14250 cell, but it is IP20, silent and useless without a Z-Wave controller. Pick the Kidde for a hub-free install, and the Aeotec if you already run SmartThings or Home Assistant over Z-Wave and want the probe and the longer battery.
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| Feature | Aeotec Water Sensor 7 Pro | Kidde WiFi Water Leak & Freeze Detector | Winner |
|---|---|---|---|
| Price | $29.99 | $23.92 | Kidde WiFi Water Leak & Freeze Detector |
| Rating | 4.1 | 3.9 | Aeotec Water Sensor 7 Pro |
| On Device Alert Sound | NO | YES | Kidde WiFi Water Leak & Freeze Detector |
| Weather Resistance | IP20 | NO | Different strengths |
| Warranty | 1 year | 1 year | Tie |
| Connectivity | Z-Wave | 2.4 GHz WiFi | Tie |
| Integrations | Samsung SmartThings, Home Assistant | Google Home, Home Assistant | Tie |
| Sensors | Water Leak, Temperature | Water Leak, Temperature | Tie |
| Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | Tie |
What the differences mean
Hub or no hub
The Aeotec Water Sensor 7 Pro is a Z-Wave device and needs a controller such as SmartThings or Home Assistant. The Kidde joins 2.4 GHz Wi-Fi directly, so one sensor works on its own.
Probe cable
The Aeotec ships a sensor cable that reaches into gaps a puck cannot, like under a dishwasher or behind a water heater. The Kidde has no cable and detects only where it sits.
Alarm
The Kidde has an alert sound on the unit. The Aeotec has no sound or light, so any local warning depends on your hub and its automations.
Battery
The Aeotec is rated for about three years on a single ER14250 cell. The Kidde uses two AA cells but does not publish a runtime.
Ecosystem
The Aeotec works with Samsung SmartThings and Home Assistant. The Kidde works with Google Home and Home Assistant, adding a voice assistant the Aeotec does not support directly.
Price
The Kidde is the cheaper of the pair and needs no hub. The Aeotec costs more but brings the probe and the longer battery.
Which one to buy if
- you already run a Z-Wave hub
The Aeotec Water Sensor 7 Pro pairs with SmartThings or Home Assistant over Z-Wave and drives custom automations.
- you need a probe in a tight spot
The Aeotec includes a sensor cable that reaches under an appliance where the body will not fit.
- you have no hub and want Wi-Fi alerts
The Kidde joins 2.4 GHz Wi-Fi directly and works with Google Home and Home Assistant.
- you want a long documented battery life
The Aeotec is rated for about three years on one cell, against the Kidde's undocumented runtime.
- you are covering several spots on a budget
The Kidde costs less and needs no hub, so multiple units stay affordable.
$29.99
- + Rating: 4.1
- - Price: $29.99 vs $23.92
- - On Device Alert Sound: NO vs YES
Winner
34% OFF
$23.92
$35.97
- + Price: $23.92
- + On Device Alert Sound: YES
- - Rating: 3.9 vs 4.1
What owners say
Owners of both sensors describe sensitive detection and an easy placement, and the split is what each one plugs into. Aeotec Water Sensor 7 Pro owners praise leak detection that fires on a small amount of moisture, the included cable for tight spaces, a quiet three-year ER14250 cell and smooth Home Assistant and SmartThings integration for automations like cutting power to a dehumidifier; their warnings are a fiddly pairing sequence on some hubs, a probe that can corrode in a permanently wet spot and no local alarm or tamper alert. Kidde WiFi Water Leak & Freeze Detector owners value the hub-free Wi-Fi setup and freeze alerts, and their complaints are Wi-Fi pairing, a hard battery cover and a slow temperature refresh.
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.
- Aeotec Water Sensor 7 Pro
- Kidde WiFi Water Leak & Freeze Detector
Loading price history...
Frequently Asked Questions
Which is better overall: Aeotec Water Sensor 7 Pro or Kidde WiFi Water Leak & Freeze Detector?
The Kidde WiFi Water Leak & Freeze Detector for a home without a hub, because it joins Wi-Fi directly, sounds an alarm on the unit and costs less. The Aeotec Water Sensor 7 Pro is the better fit if you already run Z-Wave and want the included probe cable and a long battery life.
What is the biggest difference between the Aeotec Water Sensor 7 Pro and the Kidde WiFi Water Leak & Freeze Detector?
The network and the alarm. The Aeotec Water Sensor 7 Pro needs a Z-Wave hub, has a sensor cable and is silent, while the Kidde WiFi Water Leak & Freeze Detector joins Wi-Fi with no hub and sounds its own alert.
Does the Aeotec Water Sensor 7 Pro need a hub?
Yes. It communicates only over Z-Wave and requires a Z-Wave hub, with no Wi-Fi, Bluetooth, Zigbee or Thread radio of its own.
Does the Kidde WiFi Water Leak & Freeze Detector work with Z-Wave or SmartThings?
No. It is a Wi-Fi sensor that works with Google Home and Home Assistant, with no SmartThings, Apple HomeKit or Matter.
Do both detect freezing pipes?
Yes. Both raise water, temperature and freeze alerts; the Kidde also supports low-battery alerts, and the Aeotec adds the option of a remote probe for tight spots.
Who should buy the Aeotec Water Sensor 7 Pro?
A SmartThings, Home Assistant or Hubitat household over Z-Wave that wants a probe-based sensor with about three years of battery life.
Who should buy the Kidde WiFi Water Leak & Freeze Detector?
Anyone without a hub who wants a low-cost Wi-Fi sensor with its own alarm that catches leaks and freezing pipes.
Full comparison table
Compare all 34 Water Leak Sensors side by side
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