Onset HOBO MX1102 Bluetooth (BLE) CO2 Data Logger

HOBO CO2 Logger for Mobile Devices

Affordable and Convenient

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HOBO® MX1102 Data Logger

Get your Bluetooth® Low Energy CO2/temp/RH logger now.

Onset’s award-winning HOBO MX1102 CO2 logger makes it more convenient than ever to measure and record CO2 in buildings and other non-condensing environments. It measures CO2 from 0 – 5,000 parts per million (ppm) – and our free HOBOmobile™ app allows you to access data right from your mobile phone or tablet within a 100-foot range. The MX1102 also features a USB port so it can be used with a computer running HOBOware Pro graphing and analysis software.

  • Runs for six months on four AA batteries
  • LCD displays current readings and logger status
  • Works with Onset’s free HOBOmobile app
  • Remotely access your data in Onset’s cloud-based HOBOlink software with the new MX Gateway
  • Audible alarms notify you of problems
  • Self-calibrating CO2 sensor ensures optimal accuracy and lower maintenance costs
  • Patented connectivity technology

CO2 monitoring where it counts


Tracking CO2 is a critical aspect of measuring indoor air quality and ensuring a healthy environment. Whether you need to monitor an office space, school or hospital, the HOBO MX1102 makes the process fast, easy and cost-effective.

Self-Contained, Fully-Featured

Cloud Access to Your Data

The MX Gateway works with Onset’s cloud-based HOBOlink software, giving you powerful web-based access to your data.

  • View and manage data from all MX HOBO data loggers connected to your MX Gateway
  • Easily configure alarms such as out-of-range measurements, low-battery warnings, and more
  • Create custom dashboards for data visualization
  • Export data or set automated data delivery
Learn More

Download Our White Paper

A CO2-Logging Primer for Facility Managers and Building Engineers of Offices, Schools, Healthcare Facilities, and Residential Communities. Scientific and medical research correlates poor indoor-air quality (IAQ) and elevated carbon dioxide (CO2) levels to occupant discomfort and productivity loss in offices, schools, healthcare facilities, and dwellings.