ISO 4793:1980
Laboratory sintered (fritted) filters; Porosity grading, classification and designation

Standard No.

ISO 4793:1980

Release Date

1980

Published By

International Organization for Standardization (ISO)

Latest

ISO 4793:1980

Scope

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.

ISO 4793:1980 history

• 1980 ISO 4793:1980 Laboratory sintered (fritted) filters; Porosity grading, classification and designation