METHOD AND APPARATUS FOR MONITORING NUMBER DENSITY OF AEROSOL PARTICLES

An apparatus for measuring aerosol particles includesa charging unit to form charged particles by charging particles of an aerosol sample flow by diffusion charging, anda collecting unit to provide an electric current by collecting charges from the charged particles by diffusion of the charged parti...

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Bibliographic Details
Main Authors NIKKA, Markus, ARFFMAN, Anssi, LUNTTA, Esa, LAMMINEN, Erkki, UKKONEN, Ari
Format Patent
LanguageEnglish
Published 02.03.2023
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
TESTING STATIC OR DYNAMIC BALANCE OF MACHINES ORSTRUCTURES
TESTING STRUCTURES OR APPARATUS NOT OTHERWISE PROVIDED FOR
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Summary:An apparatus for measuring aerosol particles includesa charging unit to form charged particles by charging particles of an aerosol sample flow by diffusion charging, anda collecting unit to provide an electric current by collecting charges from the charged particles by diffusion of the charged particles, the electric current being indicative of number density of aerosol particles of the aerosol sample flow.The internal pressure of the collecting unit is maintained at a reduced value in order to provide a flat response of the electric current for detecting nanoparticles of different sizes.
Bibliography:Application Number: US202117793705