In pharmaceuticals, achieving Filtration Efficiency involves using an automated aerosol control system. This system applies mono or poly-dispersed particles to one side of the filter material and detects particle counts in the upstream and downstream, along with the differential pressure. The Filtration Efficiency is then calculated as the percentage leak, determined by the ratio of upstream to downstream concentration of aerosol particles. The FEA-50 device offers detailed insights into the ability of a pharmaceutical filter material to retain particulate matter. These evaluations inform decisions on filter selection and maintenance, optimizing filtration efficiency and reliability.