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Meross MS405H Matter Smart Water Leak Sensor

Meross / MS405H, MS405HMA, MS405

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Does the Meross MS405H Matter Smart Water Leak Sensor work with HomeKit, Alexa, and Google Home?

The Meross MS405H Matter Smart Water Leak Sensor is a water leak sensor with probes on the top and bottom and a 100 dB alarm.

It connects through the Meross MSH450 hub, which makes it available to HomeKit, Alexa, Google Assistant and SmartThings over Matter. It suits HomeKit, Google Home, Alexa and SmartThings users, with native support through a Matter bridge. Home Assistant users reach it through an integration (a Matter bridge).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Yes[1]
Matter via Bridge, native
Google Home
Yes[1]
Matter via Bridge, native
Alexa
Yes[1]
Matter via Bridge, native
SmartThings
Yes[1]
Matter via Bridge, native
Home Assistant
Yes[1][2]
Matter via Bridge, via integration

Key facts

Meross MS405H Matter Smart Water Leak Sensor facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[1]
TypeWater leak sensor[1]
StandardMatter bridge[1]
HomeKitVia hub[1]
Power2 AAA batteries[1]
Connects throughMeross hub[1]
Sold inUS, EU, UK and AU[1]

Integration paths

How the Meross MS405H Matter Smart Water Leak Sensor connects

1 pathHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Matter via BridgeA Matter controller, Meross Matter Smart Hub MSH450MA[1]unknownunknown
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Ways to add the Meross MS405H Matter Smart Water Leak Sensor

1 routeHow facts are sourced: every cell cites its source below
PlatformLeveliIntegrationDetailsEvidenceLimitations
Home AssistantVia Matter bridge[1][2]matterMatter via Bridge
  • Quality: No score[1][2]
  • IoT class: Local Push[1][2]
  • Works with Home Assistant: Not certified[1][2]
Model namedNone stated
About these columns
Level
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.

Cite this page

Meross MS405H Matter Smart Water Leak Sensor. Smart Home Canon. https://smarthomecanon.com/devices/meross-ms405h. Last checked 2026-10-20.

Sources

  1. [1]
    MFRshop.meross.com / Meross Matter Smart Water Leak Sensor Kit, MS405HMA - Meross Official Store
    Accessed Back to text
  2. [2]
    DOChome-assistant.io / Home Assistant: Matter integration
    Accessed Back to text