ASTM® F25/F25M-09 – Product & Materials Guide

Standard Test Method for Sizing and Counting Airborne Particulate Contamination in Cleanrooms and Other Dust-Controlled Areas

ASTM® F25/F25M-09 provides methods for sampling, as well as the sizing and counting of macroparticles (≥5 µm) found in air samples from cleanrooms and/or dust-controlled areas. While sampling may be done in a variety of controlled areas, the number of sampling points must be proportional to the floor area of the enclosure to be checked. Samples are collected by using a vacuum to impinge particles on the membrane filter surface. The membrane filter is then examined under a microscope to determine particle size and count. Our product portfolio contains all the Millipore® filtration products you need for particle monitoring, regardless of your method or application.

Analytical Method: Visual, microscopic

Materials needed for ASTM® F25/F25M-09

  • 47 mm, stainless-steel, open-faced vacuum holder
  • Air monitoring accessories
  • Forceps to handle filter membrane

Products for ASTM® F25/F25M-09

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