An apparatus configured for an insertion of a cassette comprises at least
one distance sensor operably measuring in a contactless manner a distance
from a corresponding location on the apparatus to the inserted cassette.
An electronic evaluator is operably connected to the at least one
distance sensor to receive at least one distance signal corresponding to
distances measured by at least one distance sensor, such that the
electronic evaluator generates a position signal, resulting from the at
least one distance signal, which is dependent on a dimension and a
position of the inserted cassette in the apparatus. A control unit is
operably connected to the electronic evaluator such that the control unit
receives the position signal from the electronic evaluator.