The position X of the sample 6 in the hollow body 3 can be determined by the two position sensors 7 which are arranged on the outer wall 32 of the hollow body 3 such that they can detect a position X and a change in {HEAD ~ the position X} of {TAIL ~ the sample} 
The position X of the sample 6 in the hollow body 3 can be determined by the two position sensors 7 which are arranged on the outer wall 32 of the hollow body 3 such that they can detect a position X and a change in { HEAD ~ the position X } of { TAIL ~ the sample }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL