Co2 Insights


Carbon dioxide (CO2) is a greenhouse gas that affects the climate and the quality of life on Earth. Measuring the CO2 level in the air is important for various applications, such as environmental monitoring, industrial process control, indoor air quality, and health and safety. There are different methods to measure the CO2 level in the air, depending on the purpose and the range of concentration. Some of the common methods are:

Cavity Ring-Down Spectroscopy (CRDS)

This method uses a laser beam that is reflected inside a cavity with mirrors. The laser light is absorbed by the CO2 molecules in the cavity, and the time it takes for the light to decay is measured. This method is very precise and accurate, and can measure CO2 levels from ambient to high concentrations.

Non-Dispersive Infrared (NDIR) e.g. TechnolineWL1030

This method uses an infrared light source that passes through a sample of air. The CO2 molecules in the air absorb some of the infrared light, and the remaining light is detected by a sensor. The amount of light absorbed is proportional to the CO2concentration in the air. This method is simple and inexpensive, but less accurate than CRDS. It is widely used for indoor air quality monitoring and industrial applications.

Gas Chromatography (GC)

This method separates the different components of a gas mixture using a column and a carrier gas. The separated components are then detected by a detector, such as a flame ionization detector(FID) or a thermal conductivity detector (TCD). The CO2 concentration is calculated based on the peak area and the calibration curve. This method is accurate and sensitive, but requires more complex equipment and calibration. It is used for laboratory analysis and research purposes.


These are the main methods to measure the CO2 level in the air. Each method has its own advantages and disadvantages, and the choice of the best method depends on the application and the requirements.

Carenuity is a sensor device specialist with a portfolio of 24 devices, which you get with an enclosure as well as customized for your needs.

Motion Detector
IR Radiometer
Presence Button
Select Sensor