Dynamic pass box is installed between sterile and non-sterile areas to prevent the cross contamination. The working area contamination is cleared with vertically installed HEPA filtered air; the pass box will remove contamination that may enter during the transfer of material and cleanliness according to Class 100.

Static pass box is a simple box with a UV light, which is installed between two higher cleanliness areas and it shall have the higher pressure to prevent the cross contamination. The UV light installed in the pass box will remove contamination that may enter during the transfer of material.