VERFAHREN UND SYSTEM ZUR OPTISCHEN TRANSMISSIONSMESSUNG

摘要

An improved method is proposed for continuous optical transmission measurement particularly with a view to determining the concentration of different molecular compounds in liquids and gases, in which the optical radiations of at least four sub-beams are used and the emission values of the radiation sources are maintained at constant values. A system using this method is designed so that the different wavelength ranges of the radiation sources are used for balancing out interference effects in that the radiation of one wavelength range is integrated until a predetermined integral value is reached and the integral of the radiation of the other wavelength range obtained over the same time interval is used as the measured value.