Onset HOBO MX1101 Wireless Temperature Relative Humidity Data Logger


Key Features:

  • Wireless communication via Bluetooth to Smart Devices
  • Easy to deploy and offload using free HOBOmobile App
  • Visual and audible high amp low alarm thresholds
  • Download data from up to 100 feet away
  • Stores 84000 measurements
  • Accuracy +/- 0.2C and +/- 2RH
  • Find me/pager feature

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The Onset HOBO MX1101 data 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 100-foot range, and it requires no dedicated equipment beyond a mobile device for configuring the logger or reading out data. Using Onset’s free HOBOmobile app, you can view data in graphs, check the operational status of loggers, configure alarm notifications, and share data files.

Temperature Sensor
Range-20° to 70°C (-4° to 158°F)
Accuracy±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F), see Plot A
Resolution0.024°C at 25°C (0.04°F at 77°F), see Plot A
Drift<0.1°C (0.18°F) per year
RH Sensor*
Range1% to 90%
Accuracy±2% from 20% to 80% typical at 25°C (77°F), see Plot B
Hysteresis±2% RH
Resolution0.01% at 25°C (77°F)
Drift<1% per year typical
Response Time
Temperature7:30 minutes in air moving 1 m/s (2.2 mph)
RH20 seconds to 90% in airflow of 1 m/s (2.2 mph)
Radio Power1 mW (0 dBm)
Transmission RangeApproximately 30.5 m (100 ft) line-of-sight
Wireless Data StandardBluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
Logger Operating Range-20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Logging Rate1 second to 18 hours
Logging ModesFixed interval (normal, statistics) or burst
Memory ModesWrap when full or stop when full
Start ModesImmediate, push button, date & time, or next interval
Stop ModesWhen memory full, push button, date & time, or after a set logging period
Restart ModePush button
Time Accuracy±1 minute per month at 25°C (77°F), see Plot C
Battery Life1 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 TypeTwo AAA 1.5 V alkaline batteries, user replaceable
Memory128 KB (84,650 measurements, maximum)
Full Memory Download TimeApproximately 60 seconds; may take longer the further the device is from the logger
LCDLCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range
Size3.66 x 8.48 x 2.29 cm (1.44 x 3.34 x 0.9 in.)
Weight56 g (1.98 oz)
Environmental RatingIP50
CE CompliantThe CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

*Per RH sensor manufacturer data sheet

              Plot B: Typical RH Accuracy*
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