Development Of Calibration Device For On-Line Atmospheric Gas Analyzers

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. (C) 2019 Elsevier Ltd. All rights reserved.