HOBO Temperature/Relative Humidity Data Logger
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MX1101 HOBO Temperature/Relative Humidity Data Logger
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Part # MX1101

HOBO Temperature/Relative Humidity Data Logger

Bluetooth-enabled logger

Important Info

Requires a compatible mobile device or Windows computer and the HOBOconnect app. System requirements can be found at the bottom of the HOBOconnect software page.

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Measures and transmits temperature and relative humidity data wirelessly to mobile devices or Windows computers via Bluetooth technology.

This self-contained wireless data logger works with your mobile device or Windows computer and Onset's free HOBOconnect app so you can configure the logger and download data when within 100 feet of the logger, with no other dedicated equipment required. You can also view data in graphs, check the operational status of the logger, configure alarm notifications, and share data files.

Add the MX Gateway for remote access to your data in our cloud-based HOBOlink software.


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

In what environment does this data logger operate?

This data logger operates in an indoor environment.

What measurements does this data logger support?

The MX1101 data logger supports the following measurements: Dew Point, Relative Humidity and Temperature

The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.

Choose measurement system:

Some specifications display both measurement systems and/or refer to other similar products when mentioned.

Temperature Sensor
-20° to 70°C (-4° to 158°F)
±0.21°C from 0° to 50°C, see manual for plot (±0.38°F from 32° to 122°F, see manual for plot)
0.024°C at 25°C, see manual for plot (0.04°F at 77°F, see manual for plot)
RH Sensor*

1% to 90% (non-condensing)


±2% from 20% to 80% typical to a maximum of ±4.5% including hysteresis at 25°C (77°F); below 20% and above 80% ±6% typical



Response Time
7: 30 minutes in air moving 1 m/s (30 minutes in air moving 2.2 mph)
20 seconds to 90% in airflow of 1 m/s (20 seconds to 90% in airflow of 2.2 mph)
Radio Power
1 mW (0 dBm)
Transmission Range
Approximately 30.5 m line-of-sight (Approximately 100 ft line-of-sight)
Wireless Data Standard

Bluetooth Low Energy (Bluetooth Smart)

Logger Operating Range
-20° to 70°C; 0 to 95% RH (non-condensing) (-4° to 158°F; 0 to 95% RH (non-condensing))
Logging Rate

1 second to 18 hours

Logging Modes

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

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 the app will impact battery life. Excessive readouts, 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; (LCD is visible from 32° to 122°F;)

the LCD may react slowly or go blank in temperatures outside this range

3.66 x 8.48 x 2.29 cm (1.44 x 3.34 x 0.9 in.)
56 g (1.98 oz)
Environmental Rating


Compliance Marks

CE Compliant FCC Logo Taiwan NCC Mark South Korea KC Certification for Electrical and Electronic Products Australia/New Zealand General Compliance mark Japanese Telecom and Radio Certification Mark

*Per RH sensor manufacturer data sheet

    • HOBO MX1101 Temp/RH Data Logger
    • Command™ strip
    • Double-sided tape
    • Hook & loop strap
    • Two AAA 1.5 V alkaline batteries

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.

Product Overview Videos
Application Stories
Tech Notes
Additional Related Content

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