• Weatherproof housing for use in outdoor or condensing environments
• High-accuracy measurements
• RH sensor provides superior recovery from condensing conditions
• Small-diameter, external sensor versions for measurements in tight spaces
• Wireless setup & download with Bluetooth Low Energy (BLE)
• Convenient wireless setup and download via Bluetooth Low Energy (100-foot range)
• Retrieve data in hard-to-reach locations
• Visual alarms alert you to out-of-range conditions
• Compact, weatherproof housing with built-in mounting
• View current data in real time with Onset’s free HOBO mobile app
• Share downloaded data easily from your mobile device

The HOBO by Onset MX2304 is a weatherproof data logger with built-in temperature and relative humidity sensors. Leveraging Bluetooth Low Energy, the logger enables easy, fast set up and data download directly from your mobile device and provides high-accuracy measurements in harsh outdoor environments.

With Onset's new HOBO MX2300 Series Temp/ RH loggers, field data collection has never been easier. You can set up and offload loggers wirelessly from your mobile device eliminating the need to take a laptop or data shuttle into the field to retrieve data.

The HOBO MX2300 series data loggers record and transmit temperature and/or relative humidity (RH) in outdoor or indoor environments. These Bluetooth Low Energy-enabled loggers are designed for wireless communication with a mobile device. Using the HOBOmobile app, you can easily configure the logger, read it out, and view data on your phone or tablet, or export the data for further analysis. The logger can calculate minimum, maximum, average, and standard deviation statistics and be configured to indicate alarms at the thresholds you specify. The logger also supports burst logging in which data is logged at a faster interval when sensor readings are above or below certain limits. The Temp and Temp/RH models have internal sensors while the External Temp /RH, External Temp, and 2x External Temp include built-in external sensors, offering a wide range of solutions for monitoring temperature and RH in numerous applications.