MX1101 Bluetooth Data Logger monitors Temperature and Relative Humidity of Indoor Environments

Convenient wireless setup and easy data download via Bluetooth Low Energy (BLE) technology, Audible and visual LCD-screen alarms


MX1101 bluetooth data logger measures temperature, relative humidity and transmits data wirelessly using bluetooth.

Bluetooth enabled, wireless data logger requires compatible mobile device or Windows computer and Onset's free HOBOconnect app to access data, at any time, when within 100 feet of the logger. Configure the logger, read out data, view data in graphs, check the operational status of loggers, configure alarm notifications, and share data files - no other equipment is required other than a compatible mobile device or laptop.

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

Contact ELFIN to learn more about the benefits of continuous indoor air quality monitoring. We can help you to be better informed of your building's indoor air quality.

Key Features

• Wireless communication via Bluetooth Low Energy (BLE) 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
• 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?
HOBO MX1101 data logger supports the following measurements: Relative Humidity and Temperature


The country of origin for this product is Vietnam.



Temperature Sensor



-20° to 70°C (-4° to 158°F)

±0.21°C from 0° to 50°C (±0.36°F from 32° to 122°F)



0.024°C at 25°C (0.004°F at 77°F)

<0.1°C (0.18°F) per year

RH Sensor
Range 1% to 90% (non condensing)
Accuracy ±2.0% 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
Resolution 0.01%
Drift <1% per year typical
Logger Response Time

Temp. Response Time

RH Response Time

7:30 minutes in air moving 1 m/s (2.2 mph)

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

Logging Operating Range -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
Transmission Range Approximately 30.5 m (100 ft) line-of-sight

Logging Rate & Modes

1 second to 18 hours, Fixed interval (normal, statistics) or burst

Memory Modes Wrap when full or stop when full
Time Accuracy ±1 minute per month at 25°C
Power Source 2 AAA 1.5 Volt alkaline batteries, user replaceable
Battery Life 1 year, typical with logging interval of 1 minute. Excessive readouts, audible alarms, and paging all impact battery life. Visual alarms and other events can have a marginal impact on battery life.


128 KB (84,650 measurements, maximum)

Full Memory Download Time

Approximately 60 seconds depending on the mobile device; may take longer the further the device is from the logger

LCD 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
Size 3.66 x 8.48 x 2.29 cm (1.44 x 3.34 x 0.9 in.)
Weight 56 g
Environmental Rating IP50