Meross Smart Water Leak Sensor, MS405HK — 100 dB Alerts, IP66 Protection. Stop leaks before they become disasters with an app-connected detector for kitchens, basements, and laundry rooms. Dual-side probes catch slow drips and burst pipes, while hub-backed 433 MHz keeps alerts reliable across your home.
- Hub required: Works with Meross Smart Hub MSH400HK. Not included.
- Loud safety: 100 dB dual alarm (sensor + hub)
- Real-time notifications: App alerts with 2-year incident log/export
- Broad compatibility: Apple Home, Alexa, Google, SmartThings
- Long life: 2×AAA included; 3+ years typical
- Rugged build: IP66 waterproof shell
- Extended range: Up to 100 m SubG 433 MHz link
Meross Smart Water Leak Sensor, MS405HK — 100 dB protection, App alerts & IP66 resistance
Stop water leaks before they start
Catch leaks before they cause expensive damage. The MS405HK from Meross combines precise dual-sided probes, a loud 100 dB alarm, and smart notifications via a hub to protect kitchens, bathrooms, basements, and under-sink areas — 24/7.
Meross Smart Water Leak Sensor MS405HK (EU version)
Why you will love it
- From drops to bursts: Top and bottom probes detect puddles, rising water, slow seepage, and sudden pipe failures.
- You will hear the alert: Dual alarm up to 100 dB (sensor + hub) will wake even a heavy sleeper and notify the whole household.
- Peace of mind in real-time: Instant in-app notifications, a 2-year incident timeline, and exportable logs for insurance or maintenance.
- Ready for the smart home: Works with Apple Home, Alexa, Google Assistant, and SmartThings (via Meross hub).
- Built to last: IP66 protected housing to handle splashing and standing water; 2× AAA batteries (included) with typical 3+ years of battery life.
- Whole-home coverage: Up to 100 m via Sub-G 433 MHz (via hub) — more robust than standard Wi-Fi or Zigbee/Thread in challenging locations.
- Eye-catching automations: Create colorful light alerts (e.g., red lights) for immediate warning.
Ideal for:
- Basements, storage rooms, laundry rooms, kitchens, bathrooms
- Under the sink, near water heaters, pumps, and AC drip pans
- Second homes and rentals that require reliable remote notifications
Setup and Compatibility
- Hub Options: Pairs with the Meross Smart Hub MSH400HK (also compatible with MSH300) for app notifications, logs, voice assistants, and dual siren.
- Standalone Version: This version ships without the hub; the sensor's local alarm works independently. Add a hub for notifications and integrations.
Technical Specifications - Meross Smart Water Leak Sensor
- Battery: 2 × AAA (included), replaceable; typical lifespan > 3 years
- Alarm Volume: up to 100 dB (sensor); hub adds a second 100 dB siren
- Wireless Standard: Sub-G 433 MHz (sensor <—> Meross hub)
- Range: up to 100 m (open space; actual range depends on the environment)
- Platforms (via hub): Apple Home, Amazon Alexa, Google Assistant, SmartThings
- Dimensions (W × D × H): 63 × 63 × 27 mm
- Protection: IP66 dustproof & waterproof design
- Sensing: Top and bottom probes for multi-surface detection
- Operating Temperature: 0–40 °C (32–104 °F)
- Storage Temperature: −20–50 °C (−4–122 °F)
- Humidity: Operating 10–90 % RH non-condensing; storage 5–90 % RH non-condensing
- Certifications: US: FCC | EU: CE, RoHS, WEEE
- Package Contents: 1 × Smart Water Leak Sensor (MS405HK), 2 × AAA batteries (pre-installed), 1 × User Manual
Requirements: Smartphone with iOS 13+ or Android 8.0+, Existing 2.4 GHz Wi-Fi (for hub connection), Meross Smart Hub (MSH400HK/MSH300) for app alerts, logging, voice control, and dual alarm
Notes: Place sensors in high-risk areas (pipe joints, under appliances, under the sink). Use multiple units for wider coverage. Automations (e.g., colored lights) require compatible lighting and integrations via the hub.
