CM1106LS High Accuracy Single Channel NDIR CO2 Sensor

The CM1106LS strikes the perfect balance between power consumption and accuracy with <36mA supply current and +/-50ppm +3% accuracy.
The sensor is an ideal for indoor ventilation control and CO2 monitoring in commercial and residential HVAC applications.


  • Small size and Easy Integration
  • Long Lifespan 15+ years
  • Maintenance Free - Automatic Baseline Calibration (ABC)
  • Temperature and Humidity Compensation Throughout The Entire Measurement Range



Accuracy ‘+/-50ppm + 3% of reading
Measurement Range 400 to 5,000ppm
Temperature Range 14˚F to 155˚F (-10˚C to 50˚C)
Humidity Range 0-95% RH
Supply Voltage 4.3-5.5 VDC
Supply Current <35mA
Communication Interfaces PWM, UART & I2C
Dimensions 33.5 x 19.7 x 8.9mm
Weight 5g
Life Expectancy >10 years

Operating Principle

Single Channel Non-Dispersive Infrared (NDIR) Sensors

NDIR sensors leverage Lambert-Beer’s law that states certain gasses exhibit absorption characteristics at a specific infrared wavelength.

Single Channel NDIR sensors use an single infrared light source and a single IR detector “tuned” to the specific wavelength for the target gas. The IR light is passed through an optical bench that “folds” the light within the optical bench to create a long optical path length – providing high accuracy and resolution when measuring the target gas.

As the target gas concentration increases, the amount of received IR light at the IR detector decreases, this relationship is converted to a PPM measurement within the sensor.


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