ISO 12103-1 A4 Ultrafine Test Contaminant Technical sheet

ISO 12103-1 A4 Ultrafine Test Contaminant: A test dust with a particle size range of 0–180 microns, featuring a median particle size of approximately 40 microns. Composed of 69–77% quartz, used for evaluating the performance of air, oil, and hydraulic filters.