Device profile · Specifications & compatibility
Meross Smart Multi-Function Water Leak Sensor
Meross · Water Leak Sensors · Model MS420H
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- Meross Smart Multi-Function Water Leak Sensor lists Sensor Cable; On Device Alert Sound; Water Leak Alerts.
- Check whether the cable is included, the maximum length and the areas it can cover.
Browse more from Meross or explore all water leak sensors in our catalog.
- Recorded year
- 2026
- Recorded warranty
- 1 year
- Dimensions
- 31.5 x 29.5 x 85 mm
- Weight
- ?
The details that shape your choice
Meross Smart Multi-Function Water Leak Sensor Quick Features
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From specification to decision
Meross Smart Multi-Function Water Leak Sensor: Capabilities And Limitations
Based on listed specifications, not hands-on testing. Manufacturer sources are linked where checked.
What it offers
A sensing cable is listed, offering a way to investigate leak coverage beyond a single point. Check whether the cable is included, the maximum length and the areas it can cover. Ships with a 1.5 m extension probe that reaches behind washing machines, under sinks or into tanks.
View Sensor Cable details →An on-device audible alert is listed as an additional notification route. Check power requirements and whether the alert works independently of network connectivity. Built-in buzzer rated up to 100 dB, with adjustable volume and a mute mode.
View On Device Alert Sound details →Water-leak alerts are recorded as a supported monitoring event. Verify the notification path and any controller dependency. An alert alone does not close a water valve.
View Water Leak Alerts details →
What to consider
Tamper alerts are recorded as unavailable.
View Tamper Alerts details →Temperature alerts are recorded as unavailable.
View Temperature Alerts details →Tilt detection is listed as unavailable.
View Tilt details →
Still needs verification
Confirm these details if they matter to your setup.
Questions About Meross Smart Multi-Function Water Leak Sensor
Does Meross Smart Multi-Function Water Leak Sensor support a water-sensing cable?
The kit includes a 1.5-metre probe. Requires an MSH450P hub. Battery life varies with settings and use. Check whether the cable is included, the maximum length and the areas it can cover.
Source: Meross Smart Multi-Function Water Leak Sensor manufacturer product page · Checked 2026-10-04
View Sensor Cable specifications →Does Meross Smart Multi-Function Water Leak Sensor sound an alert on the device?
A built-in alarm provides an audible alert. Requires an MSH450P hub. Battery life varies with settings and use. Check power requirements and whether the alert works independently of network connectivity.
Source: Meross Smart Multi-Function Water Leak Sensor manufacturer product page · Checked 2026-10-04
View On Device Alert Sound specifications →Does Meross Smart Multi-Function Water Leak Sensor report water-leak alerts?
Yes, according to the listed specifications. Verify the notification path and any controller dependency. An alert alone does not close a water valve.
View Water Leak Alerts specifications →Does Meross Smart Multi-Function Water Leak Sensor support Matter?
Matter is listed as “MSH450P Hub required”. The stated condition applies to this feature. Verify the exact device type, firmware and features exposed in your chosen platform. Matter support is not proof of feature parity. The sensor itself speaks Bluetooth Low Energy; the MSH450P hub carries it into Matter.
View Matter specifications →Does Meross Smart Multi-Function Water Leak Sensor work with Home Assistant?
Home Assistant is listed as “MSH450P Hub required”. The stated condition applies to this feature. Check the exact integration and firmware. A catalog integration label does not establish local control, official support or available entities. Via Matter through the MSH450P hub; Home Assistant is a certified Matter controller and also reads Meross devices through the community meross_lan integration.
View Home Assistant specifications →Explore the full picture
Meross Smart Multi-Function Water Leak Sensor Specifications
Recorded catalog values. Expand notes for qualifications; unknown values are not treated as missing features.
5 of 28 fields matched to manufacturer documentation. Source checks apply only to the named model and stated scope. Other fields remain catalog data. How we verify specifications →
Included Accessories1 fields
| Sensor Cable | YesManufacturer sourceThe kit includes a 1.5-metre probe. Meross Smart Multi-Function Water Leak Sensor manufacturer product page →
Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsShips with a 1.5 m extension probe that reaches behind washing machines, under sinks or into tanks. |
|---|
Features3 fields
| On Device Alert Sound | YesManufacturer sourceA built-in alarm provides an audible alert. Meross Smart Multi-Function Water Leak Sensor manufacturer product page →
Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsBuilt-in buzzer rated up to 100 dB, with adjustable volume and a mute mode. |
|---|---|
| On Device Alert Light | No |
| Automations | YesDetails & conditionsThrough the MSH450P hub a leak, drip, freeze or water-level event can trigger other devices, for example switching off a smart plug feeding the washing machine or closing a smart valve. |
Alerts5 fields
| Water Leak Alerts | Yes |
|---|---|
| Temperature Alerts | No |
| Freeze Temperature Alerts | YesManufacturer sourceFreeze detection is supported. Meross Smart Multi-Function Water Leak Sensor manufacturer product page →
Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. Details & conditionsRaises a freeze alert, and up to three conditions (leak, rain/drip, freeze or water level) can be combined before an alert fires. |
| Low Battery Alerts | Not recorded |
| Tamper Alerts | No |
Connectivity7 fields
| 2.4 GHz Wi-Fi | No |
|---|---|
| 5 GHz Wi-Fi | No |
| Bluetooth | YesDetails & conditionsBluetooth Low Energy link to the Meross MSH450P hub; the sensor has no Wi-Fi radio of its own. |
| Z Wave | No |
| Zigbee | No |
| Thread | No |
| Other | No |
Integrations6 fields
| Google Home | MSH450P Hub requiredDetails & conditionsMatter, and therefore Google Home, arrives through the Meross MSH450P hub that bridges the sensor. |
|---|---|
| Alexa | NoDetails & conditionsAlexa has no water leak sensor type: the Matter Water Leak Detector has no Alexa capability mapping, and bridges such as SmartThings or Home Assistant cannot expose a moisture sensor either |
| Apple Home | MSH450P Hub requiredDetails & conditionsThe MSH450P hub republishes the sensor over Matter, which is how it joins Apple Home. |
| SmartThings | MSH450P Hub requiredDetails & conditionsVia Matter through the MSH450P hub. |
| Home Assistant | MSH450P Hub requiredDetails & conditionsVia Matter through the MSH450P hub; Home Assistant is a certified Matter controller and also reads Meross devices through the community meross_lan integration. |
| Matter | MSH450P Hub requiredDetails & conditionsThe sensor itself speaks Bluetooth Low Energy; the MSH450P hub carries it into Matter. |
Power3 fields
| Wired | No |
|---|---|
| Battery Type | CR123A |
| Battery Life | 4 yearsManufacturer sourceAdvertised battery life is up to four years. Meross Smart Multi-Function Water Leak Sensor manufacturer product page →
Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. |
Sensors3 fields
| Water Leak | YesManufacturer sourceThe sensor detects water leaks. Meross Smart Multi-Function Water Leak Sensor manufacturer product page →
Requires an MSH450P hub. Battery life varies with settings and use. Document check only; not a hands-on test or verification of every regional or firmware variant. |
|---|---|
| Temperature | Freezing conditionsDetails & conditionsDetects freezing conditions to warn before pipes burst, rather than reporting ambient temperature readings. |
| Tilt | No |
How this device compares
Meross Smart Multi-Function Water Leak Sensor vs Other Similar Models
Statistical context from 34 water leak sensors in this catalog. These figures describe our recorded data, not independent measurements.
Recorded feature coverage
Sensor Cable: 8 of 34 known answers are Yes
Included Accessories: 24% among explicit Yes/No answers; 0 of 34 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
Freeze Temperature Alerts: 18 of 34 known answers are Yes
Alerts: 53% among explicit Yes/No answers; 0 of 34 devices have no resolved answer. Check the specifications for this model’s conditions.
Recorded feature coverage
On Device Alert Sound: 21 of 34 known answers are Yes
Features: 62% among explicit Yes/No answers; 0 of 34 devices have no resolved answer. Check the specifications for this model’s conditions.
Brand representation in this directory
2 of 34 models are from Meross
Counts water leak sensors listed here, not sales or market share. Catalog inclusion does not imply a recommendation.
Side-by-side specification comparison
Compare Meross Smart Multi-Function Water Leak Sensor vs Similar Water Leak Sensors
See how Meross Smart Multi-Function Water Leak Sensor stacks up against other water leak sensors in this catalog. Compare specifications, compatibility and pricing.
Catalog specifications have not all been independently checked against manufacturer sources. Read our data and evidence methodology.