Smart Multi-Functional Hygrometer and Thermometer Meross MS120 with Wireless Connectivity

The Smart Multi-Functional Hygrometer and Thermometer Meross MS120 with Wireless Connectivity is designed for precise, real-time indoor and outdoor climate monitoring. Featuring a 1.9-inch LCD display, this device measures temperature, relative and absolute humidity, dew point, and vapor pressure deficit (VPD). It combines low-energy wireless technology with robust construction, offering high accuracy for residential, agricultural, and specialized storage applications. Users can track current conditions directly on the screen or access historical data and remote notifications through a mobile application.

Advantages

The Meross MS120 provides exceptional measurement precision with a temperature accuracy of ±0.2°C and humidity accuracy of ±2% RH, updating every three seconds to reflect immediate environmental shifts. Its IP65 dust- and water-resistant housing, combined with UV resistance and an operational temperature range from -20°C to 60°C, ensures reliable performance in demanding environments. The built-in adjustable audible alarm reaches up to 100 dB, providing immediate on-site warnings when predefined thresholds are crossed. Additionally, the device offers local data storage for up to 120 days and extended cloud history options, while the replaceable battery delivers up to three years of continuous operation.

Suitable for

• Monitoring temperature and humidity in greenhouses and terrariums
• Tracking climate conditions in wine cellars and storage rooms
• Protecting musical instruments and cigars from improper humidity levels
• Home and office indoor climate management
• Outdoor weather observation in covered or protected outdoor spaces

When it may not be suitable

This device may not be suitable for continuous submersion in water despite its IP65 rating. Furthermore, advanced smart home integrations and cloud-based long-term data histories require a compatible Bluetooth hub that is sold separately, meaning standalone operation relies solely on local Bluetooth range and local device memory.

Key specifications

• 1.9-inch LCD displayMeasures temperature, relative humidity, absolute humidity, dew point, and vapor pressure deficitTemperature accuracy of ±0.2°CHumidity accuracy of ±2% RHSampling frequency of every 3 secondsOperating temperature range from -20°C to 60°COperating humidity range from 10% to 90% RH non-condensingIP65 water and dust resistance rating with UV protectionBluetooth Low Energy wireless connectivity with up to 150 meters range in open spaceMatter compatibility via a separate Bluetooth hubAdjustable audible alarm up to 100 dB and app notificationsLocal measurement history storage for up to 120 daysPowered by one replaceable CR123A battery with up to 3 years of lifeDimensions of 85 by 31.5 by 29.5 millimeters

How to use

To begin using the hygrometer, open the battery compartment using the included tool, remove any protective films, and insert the CR123A battery. Mount or place the device in the desired monitoring location within the specified operational temperature and humidity limits. Use the buttons or screen interface to view the five available environmental parameters. Download the companion app on a compatible smartphone running iOS or Android to pair the device via Bluetooth. Configure desired thresholds for temperature and humidity to enable app alerts and the built-in audible alarm.

What to consider before purchase

• Verify whether a separate Bluetooth hub is required for your specific smart home automation needs
• Check smartphone operating system compatibility regarding iOS and Android minimum versions
• Consider the physical placement range relative to your smartphone or gateway for stable Bluetooth connectivity
• Evaluate whether local 120-day storage meets your data logging requirements without cloud extension

Usage recommendations

Position the device away from direct heat sources and direct water jets to ensure accurate readings and longevity. Regularly check the battery status through the mobile application and replace the CR123A cell when prompted to maintain uninterrupted monitoring and alarm functionality.