Heiman Smart Water Leakage Sensor vs Third Reality Water Leak Sensor

Updated September 2026

Data from Amazon and official Heiman and Third Reality sites.

2026 verdict

IP67 and a 5-year CR123A cell put the Heiman Smart Water Leakage Sensor ahead of the Third Reality Water Leak Sensor.

Winner

Heiman Smart Water Leakage Sensor

$15.99$19.9920% OFF

Buy on Amazon USA

Heiman is also cheaper and better reviewed, with both a local siren and a status light on hub-free 2.4 GHz Wi-Fi into Home Assistant. Third Reality is the Zigbee alternative with native SmartThings and Home Assistant and a wider assistant story through a Smart Bridge MZ1. Neither senses temperature. Pick the Heiman Smart Water Leakage Sensor for a sealed, long-life Wi-Fi detector; pick the Third Reality Water Leak Sensor to stay on Zigbee.

Winner

Heiman

Heiman Smart Water Leakage Sensor

20% OFF

$15.99

$19.99

Buy on Amazon USA Buy on Amazon Canada

Third Reality

Third Reality Water Leak Sensor

$20.99

Buy on Amazon USA

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Feature	Heiman Smart Water Leakage Sensor	Third Reality Water Leak Sensor	Winner
Price	$15.99	$20.99	Heiman Smart Water Leakage Sensor
Rating	4.2	4.0	Heiman Smart Water Leakage Sensor
Weather Resistance	IP67	NO	Heiman Smart Water Leakage Sensor
Battery Life	5 years	3 years	Heiman Smart Water Leakage Sensor
Integrations	Samsung SmartThings, Home Assistant	Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant	Third Reality Water Leak Sensor
On Device Alert Light	YES	NO	Heiman Smart Water Leakage Sensor
Warranty	1 year	1 year	Tie
Connectivity	2.4 GHz WiFi	Zigbee	Tie
Sensors	Water Leak	Water Leak	Tie
Alerts	Water Leak Alerts, Low Battery Alerts	Water Leak Alerts, Low Battery Alerts	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, Apple HomeKit, Samsung SmartThings, Home Assistant

Third Reality

Third Reality Water Leak Sensor

$20.99

Buy on Amazon USA

+ Integrations: Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant
- Price: $20.99 vs $15.99
- Rating: 4.0 vs 4.2

Frequently Asked Questions

Which is better overall: the Heiman Smart Water Leakage Sensor or the Third Reality Water Leak Sensor?

The Heiman Smart Water Leakage Sensor wins overall on price, IP67 sealing, a 5-year battery, and both a local siren and a status light. The Third Reality Water Leak Sensor is the Zigbee option with native SmartThings.

What is the biggest difference between these two?

The Heiman Smart Water Leakage Sensor is a hub-free Wi-Fi leak alarm. The Third Reality Water Leak Sensor is a Zigbee leak puck that needs a Zigbee hub, with extra assistants through a Smart Bridge MZ1.

Do they detect temperature or freeze?

No. Neither the Heiman Smart Water Leakage Sensor nor the Third Reality Water Leak Sensor includes a temperature sensor.

Which one works with SmartThings?

The Third Reality Water Leak Sensor lists native SmartThings and Home Assistant. The Heiman Smart Water Leakage Sensor lists Home Assistant and only partial SmartThings support.

Who should buy the Heiman Smart Water Leakage Sensor?

Anyone who wants a sealed Wi-Fi leak detector with a local siren, a status light, and a 5-year battery, especially on Home Assistant.

Who should buy the Third Reality Water Leak Sensor?

Zigbee households that want a leak puck with a local alarm and native SmartThings.

Full comparison table

Compare all 32 Water Leak Sensors side by side

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