paper reports the development of the optical method for component analysis of natural gas mixtures with dif-
ferent compositions, allowing conducting measurements in real time. The method is based on the measurement
of the absorption coefficients for the analyzed gas mixture at several wavelengths within the infrared region of
the spectrum (7–14
m), with the selected number and values of wavelengths depending on the category of the gas mixture. The resulting accuracy of the determination of the main components of gas mixtures including
methane, ethane, propane, butane, pentane and carbon dioxide is sufficient for the use of the developed method
for the monitoring of the component composition of natural gas in pipelines.