This equipment is installed on the wall between the clean room and the other room. The pass box has two doors at its extreme ends. One door opens in the clean room and other door open in the other room. these doors are electrically & mechanically interlocked type so that any other door can be operated at a time. This avoids direct flow of air from the clean room to the other room or vice versa. This also avoid the need to open the clean room door frequently for transferring of material from & into the clean room. Thus, it helps in achieving the aim of material transfer without disturbing the cleanliness level of the clean room

It is made of Commercial board and all its external & internal surfaces are dully laminated. L.M.S. or S.S. sheet body also can be supplied optionally. Each hinged door has wide glass viewing window, through which material kept in the pass box can be seen. These doors are electrically & mechanically interlocked type, so any one door can be opened at a time. U.V. light.