The IOM Sampler with MultiDust Foam Discs can sample different dust fractions individually or simultaneously. Analysis is gravimetric for all fractions. A two-step weighing process is used to determine multiple fractions. Air Sampling Filter Selection Guide . Only Inhalable dust only Load a filter into the IOM cassette.
Inhalable dust collects on the filter.
Inhalable and Second Fraction of Interest Load the cassette bottom with a filter and weigh it. Place the appropriate MultiDust Foam Disc into the cassette top, clip it to the cassette bottom, and weigh filter, disc, and cassette together. After sampling, post-weigh the whole cassette assembly for an inhalable result. Split the cassette into two assemblies. Discard the MultiDust Foam Disc and post-weigh the cassette bottom and filter only.