HOBO MX1102A Bluetooth CO2 Datalogger

Measuring CO2 from 0 - 5,000 parts per million (ppm) the MX1102A allows you to access data right from your mobile phone or tablet.

Note: The model MX1102A is the replacement for the MX1102 with an improved operating range for CO2 measurement.


  • Wireless communication via Bluetooth Smart
  • Six month battery life at 5-minute CO2 logging rate
  • Easy to deploy and offload using free HOBOConnect App
  • USB port for use with PC running HOBOWare software 
  • Visual and audible high & low alarm thresholds
  • Self-calibrating NDIR CO2 sensor technology ensures optimal accuracy at lower maintenance costs

CO2 Measurement:

Range: 0 to 5,000 ppm

Accuracy: ±50 ppm ±5% of reading at 25°C, <90% RH and 1,013 mbar

Warm-up Time: 15 seconds

Calibration: Auto or manual to 400 ppm

Operating Pressure Range: 950 to 1,050 mbar (use Altitude Compensation for outside of this range)

Compensated Pressure Range: -305 to 5,486 m

Sensing Method: Non-dispersive infrared (NDIR) absorption


Temperature & Humidity

Range: 0° to 50°C; 1% to 90% (non-condensing);

Accuracy: ±0.21°C from 0° to 50°C; ±2% from 20% to 80% typical at 25°C

Resolution: 0.024°C at 25°C; 0.01% at 25°C


Wireless Logger

Transmission Range: Approximately 30.5 m line-of-sight

Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)

Memory: 128 KB (84,650 measurements, maximum)

Download Type: USB 2.0 interface or via Bluetooth Smart

Size: 7.62 x 12.95 x 4.78 cm; Weight: 267.4 g

Environmental Rating: IP50

Power Source: 4 AA 1.5 Volt batteries (user replaceable) or USB power source (5 V DC, 2 Watts)
Battery Life: 6 months, typical with logging and sampling intervals of 5 minutes or slower;
6 months or less with logging and sampling intervals faster than 5 minutes while logging CO2.
Battery life can be reduced by excessive use of Bluetooth connection


HOBOConnect App

Onset's free HOBOconnect app makes it fast and easy to configure compatible HOBO MX Series data loggers and manage the collected data. Just download the app from the Apple App Store or Google Play to your mobile device, or download from the Onset website to your Windows computer. With HOBOconnect, you can view data in graphs, check the operational status of loggers, share data files and graph images for analysis in Excel, Numbers, and other applications, plus store data in the cloud. HOBOconnect also lets you quickly set up audible alarm notifications, so you're immediately alerted to any problems.

  • Communicates to HOBO MX data loggers using Bluetooth (LE) technology
  • No internet connection required
  • Set data logger's name, password, logging rate, alarm threshold, start and stop time
  • Automatically upload data to Onset's cloud-based HOBOlink software to store and merge data files
  • Configure and clear audible alarms
  • Page the data logger
  • Quickly download and view data



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MX1102 CO2 bluetooth logger

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