The present disclosure relates to sensors for use on a patient’s ear. A thermal comfort rating corresponding to a range of passenger cabin temperatures is determined based upon a comfort level selection by an occupant using the control head. The comb tooth can be fastened to the comb tooth body by means of a first positively locking portion, at least one additional positively locking portion being provided on the comb tooth holder for fastening the comb tooth to the comb tooth body. When there are areas A which have different rotation angles, the recognition layer is created to satisfy a condition that, even if any corner of the area A is designated as the dummy pattern creation starting point, the created dummy pattern becomes an identical arrangement.