METHOD FOR ADAPTING IMPACTORS TO DIFFERENT AEROSOL SAMPLING CONDITIONS Russian patent published in 2022 - IPC G01N15/02 

FIELD: testing.

SUBSTANCE: invention relates to the field of examination or analysis of the size distribution of aerosol particles of pollutants in the air during sampling using impactors. The method for adapting cascade jet impactors to different aerosol sampling conditions characterised by changing the density of the substance of the collected particles and(or) the volumetric aspiration rate consists in adjusting the air velocity at the input of each cascade and (or) the length of the particle path to the trapping substrate by using sets of replaceable structural elements of impactor cascades, wherein the functionality of the same impactor under different aerosol sampling conditions is provided by combining the cross-section size of the nozzles and(or) the distance from the input channel of the cascade to the trapping substrate due to the use of a set of replaceable membranes with holes of different amounts and diameters and(or) a set of replaceable elements of stands of various lengths, retaining the trapping substrates, or stands structurally allowing for a change and fastening of the length thereof due to a threaded connection.

EFFECT: property of universality to the sampling conditions acquired by the impactors, as well as expansion of the functional capabilities thereof for selecting the required range of dispersion of the selected aerosol at various cascades.

1 cl, 2 dwg