Part Number -


HOBO Temperature/Relative Humidity Data Logger

Bluetooth wireless monitoring for indoor environments

$159.00 USD
Measures and transmits temperature and relative humidity data wirelessly to mobile devices or Windows computers via Bluetooth technology.

Important Information

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.

Compatible with


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 Onset's HOBOlink cloud software platform.

  • 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

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
<0.1°C per year
0.18°F per year

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
<1% per year typical

Response Time

7:30 minutes in air moving 1 m/s
7:30 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
Time Accuracy
±1 minute per month at 25°C
±1 minute per month at 77°F
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


Per RH sensor manufacturer data sheet
CE Compliance Mark
United States FCC Mark
Taiwan Compliance Mark
Korean KC Certification Mark
Australia-New Zealand Regulatory Compliance Mark (RCM)
Japanese TELEC Mark
Compatible items

Compliance Certificates

$30.00 USD

NIST Setup & Certifications

$116.00 USD
$182.00 USD
$51.00 USD

Protective Enclosures

$47.00 USD


$375.00 USD
What's in the box
  • HOBO MX1101 Temp/RH Data Logger
  • Command™ strip
  • Double-sided tape
  • Hook & loop strap
  • Two AAA 1.5 V alkaline batteries

HOBO MX Temp/RH Data Logger (MX1101) User's Manual

A complete overview with detailed product specifications, explanations for set-up, configuration & alarms, mounting requirements, logging modes & more
View View

Getting Started with MX Data Loggers

This Getting Started guide will walk you through the basic steps of data logging, setting up your new data logger, downloading and sharing data, and the option to upload your data to the cloud.
View View
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