13. The sample changer recited in claim 1, wherein explained conveyor suggests comprises an elevator system for sequentially going said transportation means from a first place associating with stated monitor into a second place associating with mentioned screening region; and wherein stated elevator mechanism includes a cage having 1st and https://share.evernote.com/note/24170d6c-ce7d-0f26-199f-c0f6fb5b5380