International Standard
ISO 4793:1980
Laboratory sintered (fritted) filters — Porosity grading, classification and designation
Reference number
ISO 4793:1980
ISO 4793:1980
Edition 1
1980-10
1980-10
© ISO 2024
International Standard
p
ISO 4793:1980
10772
Published
(Edition 1, 1980)
This standard was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
Filters are graded according to their pore size index in one of the eight classes specified. This is applicable to laboratory filters made of glass, vitreous silica, ceramics, metals and plastic materials. Annex A specifies a method for determination of pore size index. Annex B and C concern with a procedure for assessing uniformity of filters and for determination of air permeability.
Life cycle
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