Abstract: For a multicomponent system a mathematical model for multidimensional signals and its processing approach (transformation of coordinates) have been established. Combined measurement (PCM) system for proers consisting of non-contact sensors (on-line non-contact process combined measurement system) have been designed and proposed in the paper. On-line PCM system is a new mode of process analyzer system. It provides a stable, fast response and a very high accuracy that is bard to attain in conventional discrete and selective measurement of multicomponent analyzer system. The principle of PCM system can be widely utilized in other fields for on-line continuous industrial analysis.