CM1109 Dual IR Source NDIR CO2 Sensor

CM1109 Dual IR Source NDIR CO2 Sensor l CO2Meter
Regular price $74.63

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The CM1109 Dual IR Source NDIR CO2 Sensor is designed to measure CO2 for safety, beverage, agriculture, industrial or cold chain storage applications.

The advantage of a dual source, dual beam sensor is that over time it self-compensates for the influence of temperature and humidity, light source aging and other factors that impact the sensor's accuracy. This results in better stability over its lifetime.


  • Superior Stability & Accuracy
  • Temperature and Humidity Compensation
  • High Accuracy Supports WELL, RESET, ASHRAE 62.1-2019 Addendum aa & California Title 24 Application


  • Indoor Air Quality (IAQ)
  • HVAC controller
  • Central Air Conditioning
  • Agriculture


  • CM1109 - Dual IR Source NDIR CO2 Sensor - designed for long-term stability.
  • Sensor Development Kit (CM-200) - Easy to use, simply plug the sensor into the PCB and plug it into your PC via USB. Use our free GasLab® software to measure and graph carbon dioxide or use our library of source code on Github to build your own application or for OEM batch testing/configuration. Order sensors on this page, then order the Devkit here.

We recommend that all first time users purchase both this sensor and the CM-200 Development Kit for fastest and easiest results.


  • Target gas: Carbon Dioxide (CO2)
  • Operating principle: Non-dispersive infrared (NDIR)
  • Measurement range: 0-5,000ppm
  • Accuracy: ± (50ppm+3% of reading) @ 0°C ~ 50°C , 50±10%RH
  • Working Humidity: 0-95%RH (non-condensing)
  • Storage Temperature: -30°C ~ 70°C
  • Storage Humidity: 0-95%RH (non-condensing)
  • Sampling frequency: 2s
  • Time to first reading: ≤30s
  • Power supply: 4.5V-5.5 VDC
  • Supply current: <50mA
  • Communication Interfaces: UART and I²C
  • Life span: >10 years



Gas Sensor Development Kit (CM-200)- designed to provide customers with an easy drop-in solution. Includes our free Gaslab data logging software. Sensor sold separately.

  • Data Sheets

  • Manuals

  • Technical Documents

  • Videos

  • Additional Resources

  • Case Studies

Customer Reviews

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"Easy to install, easy to set up, and easy calibration - just what I was looking for."

- Phillip Farrar
Water Plant Superintendent

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