HOBO Temp/RH 2.5% Data Logger
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UX100-011A HOBO Temp/RH 2.5% Data Logger
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Part # UX100-011A

HOBO Temp/RH 2.5% Data Logger

Important Info

Requires HOBOware software and a USB cable. (Note: A USB cable is included with HOBOware Pro CD or USB software purchase). See compatible items below.

Other Products in this Series


With integrated sensors, measures and records temperature and relative humidity (within 2.5% accuracy) in indoor environments. This logger is ideal for monitoring occupant comfort in office buildings, tracking food storage conditions in warehouses, logging temperature trends in server rooms, and measuring humidity levels in museums.

  • Easy-to-view LCD display
  • Large memory capacity
  • Visual high & low alarm thresholds
  • Burst and Statistics logging modes
  • User-replaceable Relative Humidity sensor

In what environment does this data logger operate?

This data logger operates in an indoor environment.

What measurements does this data logger support?

The UX100-011A 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)
Response Time

4 minutes in air moving 1 m/s (2.2 mph)

RH Sensor

1% to 95% (non-condensing)


±2.5% from 10% to 90% typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical



Response Time

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

Logger Operating Range

Logging: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)

Launch/Readout: 0° to 50°C (32° to 122°F) per USB specification

Logging Rate

1 second to 18 hours, 12 minutes, 15 seconds

Logging Modes

Fixed interval (normal), burst, or statistics

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, or date & time

Restart Mode

Push button

Power Source

One 3V CR2032 lithium battery and USB cable

Battery Life

1 year, typical with logging rate of 1 minute and sampling interval of 15 seconds or greater


128 KB (63,488 measurements, maximum)

Download Type

USB 2.0 interface

Full Memory Download Time

20 seconds


LCD is visible from 0° to 50°C (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.)
30 g (1.06 oz)
Environmental Rating


Compliance Marks

CE Compliant

    • HOBO UX100-011 Temp/RH 2.5% Data Logger
    • Command™ strip
    • Double-sided tape
    • Hook & loop strap

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.

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A low-cost, splash-proof, Bluetooth-enabled data logger that measures and transmits temperature data wirelessly to mobile devices or Windows computers. 

Ideal for a range of indoor monitoring applications, this self-contained wireless data logger lets you configure it and access temperature data at any time when within 100 feet of the logger, with no dedicated equipment beyond a mobile device or Windows computer running the HOBOconnect app. 

Onset's free HOBOconnect app makes it fast and easy to view temperature graphs, check the operational status of MX100 loggers, configure alarm notifications, and share data files.

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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.


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