Measuring Techniques of Stack Dust

Abstract

A large number of stack dust measurement are widely carried out for the purpose of air pollution, combustion, product controls, and so on.In general these measurements are manually performed by the gravimetric method;isokinetic sampling, dust filtrating and weighing, while the techniques of automatic stack dust monitoring have not been yet satisfactorily established.
In this paper recent advances on manual sampling techniques of dust emitted from stationary sources are reviewed with including JIS Method and EPA Method of U.S.Null-balance type dust sampling probes developed by our laboratory, which make isokinetic sampling easy and make sampling procedure automatic are reported briefly.Recent trends on automatic dust monitoring techniques are last mentioned including devices based on the principles of light transmission, light scattering and beta-attenuation.