MX1102 CO2 Bluetooth Smart CO2/Temperature / Relative Humidity Logger for Interior Air Quality



This Data Logger model has been Discontinued.
See MX1102A

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Number of Channels 3: CO2/Temp/HR
ADC Bits 16 bit
Precision ±50 ppm/±0.21°C/±2%
Resolution 0.024°C/0.01% hr
With Display No
IP Classification IP67
Communications Bluetooth BLE
Battery Life 6 months
Memory Capacity 84,650 measurements
Type of Instrument Air Quality Analyzer
The instrument measures: CO2, T & HR

MX1102 Carbon Dioxide 
Onset’s 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 graphing and analysis software.


*iOS 8.0–8.3 required; Android app support estimated early Fall 2015.

Learn More!

Environment: The MX1102 Data Logger is for use in Indoor environments

Measurements: The MX1102 Data Logger supports the following measurements: Temperature • Relative Humidity • Carbon Dioxide


The data logger requires either the HOBOmobile App and a compatible mobile device or Onset's HOBOware software.
The system requirements for the HOBOmobile app can be found at the bottom of our HOBOmobile software page. 

Temperature Sensor 
Range: 0° to 50°C (32° to 122°F)
Accuracy: ±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F)
Resolution: 0.024°C at 25°C (0.04°F at 77°F)
Drift: <0.1°C (0.18°F) per year

RH Sensor*
Range: 1% to 70% RH when CO2 sensor is enabled (non-condensing)

           1% to 90% RH when CO2 sensor is disabled (non-condensing)
Accuracy: ±2% from 20% to 80% typical at 25°C (77°F)
Hysteresis: ±2% RH
Resolution: 0.01% at 25°C (77°F)
Drift: <1% per year typical

CO2 Sensor
Range: 0 to 5,000 ppm
Accuracy: ±50 ppm ±5% of reading at 25°C (77°F), less than 70% RH and 1,013 mbar
Warm-up Time: 15 seconds
Calibration: Auto or manual to 400 ppm
Non-linearity: <1% of FS
Pressure Dependence: 0.13% of reading per mm Hg (corrected via user input for elevation/altitude)
Operating Pressure Range: 950 to 1,050 mbar (use Altitude Compensation for outside of this range)
Compensated Pressure Range: -305 to 5,486 m (-1,000 to 18,000 ft)
Sensing Method: Non-dispersive infrared (NDIR) absorption

Response Time:
Temperature: 12 minutes to 90% in airflow of 1 m/s (2.2 mph)
RH: 1 minute to 90% in airflow of 1 m/s (2.2 mph)
CO2: 1 minute to 90% in airflow of 1 m/s (2.2 mph)

Radio Power: 1 mW (0 dBm)
Transmission Range: Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard: Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
Logger Operating Range: 0° to 50°C (32° to 122°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
Time Accuracy: ± 1 minute per month at 25°C (77°F)
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. Entering burst logging mode will impact battery life. With HOBOmobile use, battery life can be reduced by remaining connected, excessive readouts, checking of Full Status Details, audible alarms, and paging. Visual/audible alarms and other events can have a marginal impact on battery life.

Memory: 128 KB (84,650 measurements, maximum)
Download Type: USB 2.0 interface or via Bluetooth Smart
Full Memory Download Time: 20 seconds via USB; approximately 60 seconds via Bluetooth Smart, 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: 7.62 x 12.95 x 4.78 cm (3.0 x 5.1 x 1.88 inches)
Weight: 267.4 g (9.43 oz)
Environmental Rating: IP50

The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.



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