A thermometer (100) useful for measuring the temperature of a patient, the thermometer including a housing (102), at least one temperature sensor assembly (130) including a plurality of external patient skin contacting surfaces (138), and a mounting element (134) for mounting the at least one temperature sensor assembly (130) on the housing (102) and being operative for mutually independently mounting each of the plurality of external patient skin contacting surfaces (138) to be independently arrangeable in a spatial orientation which may be independently different from the spatial orientation of the external patient skin contacting surface of each other of the plurality of external patient skin contacting surfaces.