Water Leak Sensors · Head to head

Meross Smart Water Leak 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 Meross and Honeywell Home sites.
2026 verdict
If freeze protection and a sensing cable are part of the plan, the Resideo L1 WiFi Water Leak and Freeze Detector is the stronger water leak sensor of these two.
Resideo L1 WiFi Water Leak and Freeze Detector
Winner
Resideo L1 WiFi Water Leak and Freeze Detector
$68.00

Last recorded price

Buy on Amazon USA
It tracks temperature and humidity, warns when pipes are at risk of freezing, senses along a 5 ft cable that extends to 500 ft, and sounds a 100 dBA buzzer with a red LED, all from a two-year warranty and with no hub. The Meross Smart Water Leak Sensor is the more affordable option and the more connected one, with Apple HomeKit, SmartThings and Home Assistant support through a Meross Smart Wi-Fi Hub, plus IP67 sealing and an on-device alarm. Choose the Resideo L1 WiFi Water Leak and Freeze Detector for line coverage and freeze alerts; choose the Meross Smart Water Leak Sensor for a waterproof, HomeKit-friendly leak alarm at a lower cost.
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FeatureMeross Smart Water Leak SensorResideo L1 WiFi Water Leak and Freeze DetectorWinner
Warranty1 year2 yearsResideo L1 WiFi Water Leak and Freeze Detector
Weather ResistanceIP67IP44Meross Smart Water Leak Sensor
Battery Life1.5 years2 yearsResideo L1 WiFi Water Leak and Freeze Detector
ConnectivityOther2.4 GHz WiFi, BluetoothResideo L1 WiFi Water Leak and Freeze Detector
IntegrationsApple HomeKit, Samsung SmartThings, Home AssistantNoneMeross Smart Water Leak Sensor
SensorsWater LeakWater Leak, TemperatureResideo L1 WiFi Water Leak and Freeze Detector
AlertsWater Leak AlertsWater Leak Alerts, Temperature Alerts, Freeze Temperature AlertsResideo L1 WiFi Water Leak and Freeze Detector
On Device Alert LightNOYESResideo L1 WiFi Water Leak and Freeze Detector
Rating3.73.7Tie
On Device Alert SoundYESYESTie

What the differences mean

Freeze and climate sensing

The Resideo L1 WiFi Water Leak and Freeze Detector tracks temperature and humidity and alerts when either leaves a range you set, doubling as a freeze warning for pipes. The Meross Smart Water Leak Sensor is leak-only, with no temperature or freeze alerts.

Coverage

The Resideo L1 WiFi Water Leak and Freeze Detector senses water at its base and along a 5 ft cable that accessory cables extend to 500 ft, covering a whole utility room. The Meross Smart Water Leak Sensor has no cable and watches only the spot it sits on.

Hub or direct

The Resideo L1 WiFi Water Leak and Freeze Detector joins 2.4 GHz Wi-Fi on its own, with Bluetooth only for setup, so it needs no hub. The Meross Smart Water Leak Sensor talks Sub-1G to a Meross Smart Wi-Fi Hub, which carries the network connection.

Local alert

The Resideo L1 WiFi Water Leak and Freeze Detector sounds a 100 dBA buzzer and blinks a red LED on the device. The Meross Smart Water Leak Sensor has an on-device alarm of about 60 dB and no alert light, so app notifications do more of the work.

Smart home platforms

The Meross Smart Water Leak Sensor supports Apple HomeKit, SmartThings and Home Assistant. The Resideo L1 WiFi Water Leak and Freeze Detector stays inside the First Alert and Resideo apps, with no Alexa, Google Home, Apple HomeKit, SmartThings or Matter.

Water resistance

The Meross Smart Water Leak Sensor is IP67 rated and survives a puddle. The Resideo L1 WiFi Water Leak and Freeze Detector is IP44, splash-resistant rather than submersible.

Which one to buy if

Meross

Meross Smart Water Leak Sensor

Prime exclusive deal

Last recorded price$23.99

Currently unavailable on Amazon USA
See on Amazon USA
  • + Weather Resistance: IP67
  • + Integrations: Apple HomeKit, Samsung SmartThings, Home Assistant
  • - Warranty: 1 year vs 2 years
  • - Battery Life: 1.5 years vs 2 years

What owners say

Meross Smart Water Leak Sensor owners describe pairing with the Meross Smart Wi-Fi Hub as quick and clean, with sensors showing up in Apple Home right away and able to trigger automations like closing a solenoid valve. They praise the compact IP67 housing for tucking under a sink or behind a washer, and several describe a real leak caught early enough to prevent damage. The problem they keep reporting is the hub itself dropping offline and needing a manual restart, roughly monthly for some, which silently stops remote alerts until someone notices; one buyer worked around it with a scheduled smart-plug power cycle. A few also find the on-device alarm, around 60 dB, too quiet to count on, and there is no alert light to compensate.

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.

  • Meross Smart Water Leak Sensor
  • Resideo L1 WiFi Water Leak and Freeze Detector

Loading price history...

Frequently Asked Questions

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

The Resideo L1 WiFi Water Leak and Freeze Detector is better overall, winning on battery life, connectivity, sensor coverage and alert options with a cable sensor, freeze tracking and a 100 dBA local alarm. The Meross Smart Water Leak Sensor is the alternative when you want IP67 water resistance, wider smart home integrations and a lower cost.

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

Freeze coverage and cable reach against a spot sensor. The Resideo L1 WiFi Water Leak and Freeze Detector tracks temperature, alerts on freezing pipes and senses along a 500 ft-capable cable, while the Meross Smart Water Leak Sensor detects water only at the point where it sits.

Which sensor lasts longer on batteries, the Meross Smart Water Leak Sensor or the Resideo L1 WiFi Water Leak and Freeze Detector?

The Resideo L1 WiFi Water Leak and Freeze Detector is rated for about two years on two AA cells; the Meross Smart Water Leak Sensor is rated for about a year and a half on a CR123A.

Can either sensor warn about freezing pipes?

Only the Resideo L1 WiFi Water Leak and Freeze Detector, which has freeze alerts plus temperature and humidity tracking. The Meross Smart Water Leak Sensor does not list freeze or temperature alerts.

Who should buy the Meross Smart Water Leak Sensor?

Apple Home, SmartThings or Home Assistant households that want an affordable, IP67-rated leak sensor with an on-device alarm, on a hub they can place separately.

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

Anyone who needs cable coverage over a long pipe run, freeze warnings and a loud local alarm, and who is happy living in the Resideo app without a hub.

Full comparison table

Compare all 34 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.

  • 34 Water Leak Sensors
  • 36 specs compared
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