An individual rotating driving wheel is productive in transferring a person hundred samples independently travelling on the continual keep track of. Also disclosed is a breakaway safety mechanism related to the elevator, and indicates for detecting and signaling jams inside the monitor and elevator. HT1000I provides easy set up and https://share.evernote.com/note/24170d6c-ce7d-0f26-199f-c0f6fb5b5380