Heiman Smart Water Leakage Sensor vs Kidde WiFi Water Leak & Freeze Detector

Updated September 2026

Data from Amazon and official Heiman and Kidde sites.

2026 verdict

Waterproof housing and a cheaper ask put the Heiman Smart Water Leakage Sensor in front of the Kidde WiFi Water Leak & Freeze Detector.

Winner

Heiman Smart Water Leakage Sensor

$15.99$19.9920% OFF

Buy on Amazon USA

Heiman wins on price, owner reviews, IP67 sealing, and an on-device alert light, pairing 2.4 GHz Wi-Fi with a local siren, a 5-year CR123A battery, and Home Assistant. The Kidde WiFi Water Leak & Freeze Detector still brings Alexa, Google Home, a temperature sensor, and freeze alerts that Heiman does not offer. Choose the Heiman Smart Water Leakage Sensor for a sealed, loud, budget leak puck; pick the Kidde WiFi Water Leak & Freeze Detector when freeze warnings and Alexa or Google Home are the reason you are shopping.

Winner

Heiman

Heiman Smart Water Leakage Sensor

20% OFF

$15.99

$19.99

Buy on Amazon USA Buy on Amazon Canada

Kidde

Kidde WiFi Water Leak & Freeze Detector

$18.43

Buy on Amazon USA

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Feature	Heiman Smart Water Leakage Sensor	Kidde WiFi Water Leak & Freeze Detector	Winner
Price	$15.99	$18.43	Heiman Smart Water Leakage Sensor
Rating	4.2	4.0	Heiman Smart Water Leakage Sensor
Weather Resistance	IP67	NO	Heiman Smart Water Leakage Sensor
Integrations	Samsung SmartThings, Home Assistant	Google Home, Alexa, Home Assistant	Kidde WiFi Water Leak & Freeze Detector
Sensors	Water Leak	Water Leak, Temperature	Kidde WiFi Water Leak & Freeze Detector
Alerts	Water Leak Alerts, Low Battery Alerts	Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts	Kidde WiFi Water Leak & Freeze Detector
On Device Alert Light	YES	NO	Heiman Smart Water Leakage Sensor
Warranty	1 year	1 year	Tie
Connectivity	2.4 GHz WiFi	2.4 GHz WiFi	Tie
On Device Alert Sound	YES	YES	Tie

Winner

Heiman

Heiman Smart Water Leakage Sensor

20% OFF

$15.99

$19.99

Buy on Amazon USA Buy on Amazon Canada

+ Price: $15.99
+ Rating: 4.2
+ Weather Resistance: IP67
- Integrations: Samsung SmartThings, Home Assistant vs Google Home, Alexa, Home Assistant
- Sensors: Water Leak vs Water Leak, Temperature

Kidde

Kidde WiFi Water Leak & Freeze Detector

$18.43

Buy on Amazon USA

+ Integrations: Google Home, Alexa, Home Assistant
+ Sensors: Water Leak, Temperature
+ Alerts: Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts
- Price: $18.43 vs $15.99
- Rating: 4.0 vs 4.2

Frequently Asked Questions

Which is better overall: the Heiman Smart Water Leakage Sensor or the Kidde WiFi Water Leak & Freeze Detector?

The Heiman Smart Water Leakage Sensor wins overall on price, reviews, IP67 sealing, and an alert light. The Kidde WiFi Water Leak & Freeze Detector is the one to pick if you need freeze-temperature alerts or Alexa and Google Home.

What is the biggest difference between the Heiman Smart Water Leakage Sensor and the Kidde WiFi Water Leak & Freeze Detector?

A sealed leak alarm versus a freeze-and-leak voice-assistant puck. The Heiman Smart Water Leakage Sensor is IP67 with a local siren and light, Home Assistant, and a 5-year CR123A battery, but it has no Alexa, Google Home or HomeKit. The Kidde WiFi Water Leak & Freeze Detector adds temperature and freeze alerts plus Alexa and Google Home, without a weather-resistance rating.

Does the Heiman Smart Water Leakage Sensor warn about freezing pipes?

No. The Heiman Smart Water Leakage Sensor is water-leak only. Freeze-temperature alerts belong to the Kidde WiFi Water Leak & Freeze Detector.

Does the Heiman Smart Water Leakage Sensor need a gateway?

The local 75 dB alarm works on its own. Full remote and app alerts need Heiman's gateway, which is not bundled with every listing. The Kidde WiFi Water Leak & Freeze Detector joins 2.4 GHz Wi-Fi on its own for phone alerts.

Who should buy the Heiman Smart Water Leakage Sensor?

Buyers who want the cheaper IP67 leak puck with a local siren and light, a long-rated battery, and Home Assistant, and who do not need freeze detection or Alexa.

Who should buy the Kidde WiFi Water Leak & Freeze Detector?

Buyers who want hub-free Wi-Fi, freeze-pipe warnings, and Alexa or Google Home, and who can live without a weather-resistance rating.

Full comparison table

Compare all 32 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.