Meross MS420 Smart Multifunctional Flood Sensor with Bluetooth, 100 dB Alarm, IP65 Rating, and 1.5-Meter Cable

The Meross MS420 Smart Multifunctional Flood Sensor with Bluetooth, 100 dB Alarm, IP65 Rating, and 1.5-Meter Cable is designed to safeguard your home against unexpected water leaks, pipe freezing, and flooding risks. Featuring a large electrode surface area and an adjustable probe height, this intelligent water detector provides reliable monitoring for residential properties. It integrates modern wireless technology with a durable physical design to ensure peace of mind.

Advantages

This smart flood sensor offers exceptional versatility through its extended 1.5-meter probe cable, allowing users to monitor confined spaces that are normally difficult to reach. The adjustable probe height lets you customize sensitivity to prevent false alarms from temporary moisture while catching genuine leaks early. Energy-efficient Bluetooth Low Energy connectivity ensures long-term operation, and the loud built-in acoustic signal immediately draws attention to potential hazards.

Suitable for

• Monitoring spaces under washing machines and dishwashers
• Detecting water leaks near hot water heaters and plumbing pipes
• Tracking water levels in tanks, aquariums, and animal fountains
• Guarding basements and utility rooms against rainwater flooding
• Alerting users to potential pipe freezing risks in cold areas

When it may not be suitable

This device may not be suitable for locations completely out of Bluetooth range from a compatible smartphone or gateway if remote monitoring is strictly required without local connectivity. It is also not designed for continuous underwater immersion of the main housing unit beyond its specified IP65 rating limits.

Key specifications

• Bluetooth Low Energy connectivity
• 100 dB built-in audible alarm
• IP65 water and dust resistance rating
• 1.5-meter additional probe cable
• Adjustable probe height from 0 to 7.7 mm
• Powered by a single replaceable CR123A battery
• Operating temperature range from -20°C to 60°C
• Operating humidity range from 10% to 90% RH
• Compatible with iOS 13.0 or later and Android 8.0 or later

How to use

To set up the sensor, insert the CR123A battery and pair the device with your smartphone using the supported mobile operating systems. Position the main unit securely in the desired area and route the 1.5-meter probe cable into narrow gaps or directly beneath appliances where leaks are most likely to occur. Use the adjustable probe height mechanism to calibrate the sensitivity according to your local environment. Regularly test the audible alarm and monitor battery status through your connected mobile device.

What to consider before purchase

• Verify that your smartphone meets the minimum operating system requirements of Android 8.0 or iOS 13.0
• Check that the Bluetooth connection range is sufficient for your intended installation spot
• Confirm whether you need remote internet notifications or if local Bluetooth alerts meet your needs
• Measure the distance to hard-to-reach areas to ensure the 1.5-meter cable is long enough

Usage recommendations

Always install the probe in areas prone to pooling water, such as directly on the floor near plumbing fixtures or beneath appliances, while keeping the main housing mounted safely above potential water levels. Periodically check the battery status and test the 100 dB alarm to ensure continuous protection against unexpected leaks and freezing conditions.