HOBO MX1101 Bluetooth Low Energy Temperature/Relative Humidity Data Logger

SKU: MX1101


Onset’s HOBO MX1101 data logger measures and transmits temperature and relative humidity data wirelessly to mobile devices via Bluetooth Low Energy (BLE) technology.

It 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 100-foot range.You can view data in graphs, check the operational status of loggers, configure alarm notifications, and share data files.


  • Wireless communication via Bluetooth Low Energy (BLE) technology
  • Easy to deploy and offload using free HOBOmobile App
  • Visual and audible high & low alarm thresholds
  • Stores 84,000 measurements
  • Accuracy: +/- 0.2°C and +/- 2%RH
  • Find me/pager feature
  • Patented connectivity technology
Temperature Sensor



-20°C to 70°C


±0.21°C from 0° to 50°C


0.024°C at 25°C


<0.1°C per year

Relative Humidity Sensor


Response Time

20 seconds to 90% in airflow of 1 m/s (2.2 mph)

Drift time

<0.1°C per year



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)

Operating range

-20° to 70°C; 0 to 95% RH (non-condensing)

Logging rate

1 second to 18 hours

Logging mode

Fixed interval (normal, statistics) or burst

Memory Modes

Wrap when full or stop when full

Start Modes

Immediate, push button, date & time, or next interval

Stop Modes

When memory full, push button, date & time, or after a set logging period

Restart Mode

Push button

Time Accuracy

±1 minute per month at 25°C

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


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 is visible from 0° to 50°C; the LCD may react slowly or go blank in temperatures outside this range


3.66 x 8.48 x 2.29cm



Environmental Rating

IP 50


The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

HOBO MX1101 Data Logger Datasheet