Abstract
An on-line calibration device for atmospheric gas analyzers is developed by combining the dynamic gas mixtures preparation system of membrane permeation which is situated in the automated air monitoring station with a standard admixing air matrix method. The continuous, standard admixing air matrix and real-time online calibration of SO2, NO2, CO gas analyzers for automated air monitoring stations are realized with the calibration uncertainties less than 3% (k = 2). At the same time, in the calibration device, the service life of the newly invented membrane permeation system is several times longer than that of the traditional method.
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