HOBO MX1101 Bluetooth Temp/RH Logger

Measures and transmits temperature and relative humidity data wirelessly to mobile devices via Bluetooth Smart technology.

The self-contained wireless data logger, which works with Onset's free HOBOmobile® app for logger setup and data management, enables you to access data anytime from mobile device for iOS or Android over a 30m range, and it requires no dedicated equipment beyond a mobile device for configuring the logger or reading out data.

View data in graphs, check the operational status of loggers, configure alarm notifications, and share data files.

  • Wireless communication via Bluetooth Smart
  • Easy to deploy and offload using free HOBOmobile App
  • Visual and audible high & low alarm thresholds
  • Stores 84,000 measurements
  • Accuracy: +/- 0.2C and +/- 2%RH
  • Find me/pager feature



Temperature Sensor

  • Range: -20° to 70°C
  • Accuracy: ±0.21°C from 0° to 50°C
  • Resolution: 0.024°C at 25°C
  • Drift: <0.1°C (0.18°F) per year
  • Response Time: 7:30 minutes in air moving 1 m/s

RH Sensor (Per RH sensor manufacturer data sheet)

  • Range: 1% to 90%
  • Accuracy: ±2% from 20% to 80% typical at 25°C
  • Hysteresis: ±2% RH
  • Resolution: 0.01% at 25°C
  • Drift: <1% per year typical
  • Response Time: 20 seconds to 90% in airflow of 1 m/s


  • Radio Power: 1 mW (0 dBm)
  • Transmission Range: Approximately 30.5 m (100 ft) line-of-sight
  • Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
  • Logger Operating Range: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
  • Battery Life: 1 year, typical with logging interval of 1 minute. Faster logging and/or statistics sampling intervals, entering burst logging mode, and remaining connected with HOBOmobile will impact battery life. Excessive readouts, checking of Full Status Details, audible alarms, and paging all impact battery life. Visual alarms and other events can have a marginal impact on battery life.
  • Battery Type: Two AAA 1.5 V alkaline batteries, user replaceable
  • Memory: 128 KB (84,650 measurements, maximum)
  • Full Memory Download: Time Approximately 60 seconds; may take longer the further the device is from the logger
  • LCD: LCD is visible from 0° to 50°C; the LCD may react slowly or go blank in temperatures outside this range


HOBOMobile App

Onset's HOBOmobile app, a free download from the iTunes or Google Play app store, makes it a snap to configure HOBO MX1101 temperature/RH data loggers and manage the collected data. Right from a mobile phone or tablet, users can view data in graphs, check the operational status of loggers, share data files and graph images for analysis in Excel, Numbers, and other applications, and store data in the cloud. HOBOmobile also makes it fast and easy to set up audible alarm notifications so users are immediately notified of problems.

  • Communicate to the HOBO MX temperature data loggers using Bluetooth Smart technology
  • Internet connection not required to use HOBOmobile
  • Set data loggers name, password, logging rate, alarm threshold, start & stop time
  • Configure and clear audible alarms
  • Page the data logger
  • Download and view data
  • Export and share data as CSV, TXT, XLSX, or HOBO files


HOBOMobile system requirements:

  • iOS 9.2 or 9.3
  • Android 4.4, 5.0, 5.1 or 6.0.1
  • Bluetooth 4.0
  • NOT currently compatible with Windows Mobile devices

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MX1101 brochure

File Size 855KB   Filename onset-hobo-mx1101-data-logger.pdf   Download

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