RT Journal Article SR Electronic T1 Some Aspects on the Use of the Biotest RCS Air Sampler in Unidirectional Air Flow Testing JF PDA Journal of Pharmaceutical Science and Technology JO PDA J Pharm Sci Technol FD Parenteral Drug Association (PDA) SP 177 OP 180 VO 45 IS 4 A1 Ljungqvist, Bengt A1 Reinmüller, Berit YR 1991 UL http://journal.pda.org/content/45/4/177.abstract AB The Biotest Air Sampler RCS is often used for monitoring microbiological quality of air. Unidirectional air flow tests show that the dispersion region of contaminants around the RCS sampler is much larger than that of undisturbed parallel airflow. This must be taken into consideration when the RCS air sampler is used within pharmaceutical production, especially during aseptic operations.