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Water Leak Sensors · Head to head

Heiman Smart Water Leakage Sensor vs Resideo L1 WiFi Water Leak and Freeze Detector

Full Smart Water Leak Sensors comparison in 2026

Updated October 2026
Data from Amazon and official Heiman and Honeywell Home sites.
2026 verdict
For a waterproof, hub-free leak alarm that costs less and runs longer on a battery, the Heiman Smart Water Leakage Sensor is the pick of these two water leak sensors.
Heiman Smart Water Leakage Sensor
Winner
Heiman Smart Water Leakage Sensor
$15.19$19.9924% OFFPrime exclusive deal

Last recorded price

Buy on Amazon USA
It joins 2.4 GHz Wi-Fi directly, is IP67 rated, sounds a 75 dB alarm with a status light, and runs about five years on a CR123A, with Home Assistant support and partial SmartThings. The Resideo L1 WiFi Water Leak and Freeze Detector is the specialist: a 5 ft sensing cable that extends to 500 ft, temperature and humidity tracking with freeze alerts, a 100 dBA buzzer plus red LED, and a two-year warranty, all without a hub, though it stays inside the Resideo app. Choose the Heiman Smart Water Leakage Sensor for a simple, waterproof alarm that fits Home Assistant; choose the Resideo L1 WiFi Water Leak and Freeze Detector for cable coverage and freeze warnings.
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FeatureHeiman Smart Water Leakage SensorResideo L1 WiFi Water Leak and Freeze DetectorWinner
Price$15.19$68.00Heiman Smart Water Leakage Sensor
Rating4.23.8Heiman Smart Water Leakage Sensor
Warranty1 year2 yearsResideo L1 WiFi Water Leak and Freeze Detector
Weather ResistanceIP67IP44Heiman Smart Water Leakage Sensor
Battery Life10 years2 yearsHeiman Smart Water Leakage Sensor
ConnectivityOther2.4 GHz WiFi, BluetoothResideo L1 WiFi Water Leak and Freeze Detector
AlertsWater Leak Alerts, Freeze Temperature Alerts, Low Battery AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsResideo L1 WiFi Water Leak and Freeze Detector
SensorsWater Leak, TemperatureWater Leak, TemperatureTie
On Device Alert SoundYESYESTie
On Device Alert LightYESYESTie

What the differences mean

Freeze and climate sensing

The Resideo L1 WiFi Water Leak and Freeze Detector tracks temperature and humidity and alerts on freeze risk. The Heiman Smart Water Leakage Sensor detects water only, with no temperature or freeze warnings.

Coverage

The Resideo L1 WiFi Water Leak and Freeze Detector senses along a 5 ft cable that accessory cables extend to 500 ft, covering a line rather than a spot. The Heiman Smart Water Leakage Sensor has no cable and watches only where the puck sits.

Battery life

The Heiman Smart Water Leakage Sensor is rated for about five years on a CR123A; the Resideo L1 WiFi Water Leak and Freeze Detector for about two years on two AA cells. The Heiman needs attention less than half as often.

Local alarm strength

Both sound and light up on the device, but the Resideo L1 WiFi Water Leak and Freeze Detector's buzzer is rated at 100 dBA against 75 dB on the Heiman Smart Water Leakage Sensor, so the Resideo is the louder of the two in a closed utility room.

Water resistance

The Heiman Smart Water Leakage Sensor is IP67 rated and survives a puddle or submersion. The Resideo L1 WiFi Water Leak and Freeze Detector is IP44, splash-resistant but not for submersion.

Smart home reach

The Heiman Smart Water Leakage Sensor supports Home Assistant and partial SmartThings, but no Alexa, Google Home or Apple HomeKit. The Resideo L1 WiFi Water Leak and Freeze Detector has no third-party integrations and stays in the First Alert and Resideo apps.

Which one to buy if

What owners say

Owners of the Heiman Smart Water Leakage Sensor describe it as a dependable stand-alone alarm: it goes off loudly the moment water touches its contacts, with no app or hub needed to hear it, and the compact housing fits under a sink or behind a washing machine. Several bought it after a slow leak caused damage and wanted an early local warning rather than a smart gadget. The complaint that comes up most is that a single sensor does not include the gateway needed for phone alerts, which was not always clear at checkout. Buyers who did add a gateway like the 2.4 GHz Wi-Fi connection and Home Assistant support, and the five-year battery means it rarely asks for attention.

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.

  • Heiman Smart Water Leakage Sensor
  • Resideo L1 WiFi Water Leak and Freeze Detector

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Frequently Asked Questions

Which is better overall: Heiman Smart Water Leakage Sensor or Resideo L1 WiFi Water Leak and Freeze Detector?

The Heiman Smart Water Leakage Sensor is better overall, winning on price, owner reviews, IP67 water resistance and a longer battery life. The Resideo L1 WiFi Water Leak and Freeze Detector still leads on warranty, connectivity, a wider sensor set and a louder local alarm.

What is the biggest difference between the Heiman Smart Water Leakage Sensor and the Resideo L1 WiFi Water Leak and Freeze Detector?

Coverage and climate sensing. The Resideo L1 WiFi Water Leak and Freeze Detector senses along a cable that reaches up to 500 ft and tracks temperature for freeze alerts, while the Heiman Smart Water Leakage Sensor is a hub-free IP67 puck that detects water only where it sits.

Which has the longer warranty, the Heiman Smart Water Leakage Sensor or the Resideo L1 WiFi Water Leak and Freeze Detector?

The Resideo L1 WiFi Water Leak and Freeze Detector is covered for two years, against one year on the Heiman Smart Water Leakage Sensor.

Which of the Heiman Smart Water Leakage Sensor and the Resideo L1 WiFi Water Leak and Freeze Detector works with more smart home platforms?

The Heiman Smart Water Leakage Sensor reaches Home Assistant and partial SmartThings. The Resideo L1 WiFi Water Leak and Freeze Detector has no third-party smart home integrations and stays in the First Alert and Resideo apps.

Who should buy the Heiman Smart Water Leakage Sensor?

Anyone who wants a simple, stand-alone leak alarm that sounds and lights up on its own, is IP67 rated, runs about five years and works with Home Assistant.

Who should buy the Resideo L1 WiFi Water Leak and Freeze Detector?

Buyers who need cable coverage over a long pipe run, freeze warnings and the loudest on-device alarm, and who do not need third-party smart home support.

Full comparison table

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