As an auxiliary device of a clean room, pass box is mainly used to deliver small objects between clean area and clean area, unclean area and clean area. In order to reduce door's opening times of clean room, it is suggested to reduce the pollution of the clean area.
Purifying transfer window may transfer materials, equipment and tools under the protection of Class A environment. Materials, equipments or tools which have been purified may be delivered to the aseptic area, mainly from Class C area to Class B area. As to user's demand, the purifying transfer window can be equipped with UV germicidal lamp or ozone generator sterilization system.