Used Biotest Hycon RCS Plus Air Sampler, manufactured by Biotest AG, Serial No. 1375. The Biotest RCS Plus Air Sampler is used to investigate the microbiological quality of ambient air, the functionality of air treatment equipment, and the effectiveness of decontamination measures. It is used routinely in places where specified airborne microbial counts as prescribed by law or through individual standards may not be exceeded. The RCS Plus Air Sampler provides a simple means of testing concentrations of airborne microbes. The RCS Plus Air Sampler has proved its value particularly in laminar flow areas and in sterile areas of industrial and hospital environments where low concentrations of airborne microbes are to be expected.