Abstract: A medical diagnostic apparatus including a housing, a sensor assembly located within the housing and including a temperature sensing element, and at least one thermal seal compressed between the sensor assembly and the housing and separating the temperature sensing element from heat-generating internal components of the apparatus. A rigid printed circuit board (PCB) and a rigid frame are also positioned within the housing and secured together with the housing to provide the apparatus with improved stiffness and torsional rigidity. A docking station for use with the apparatus defines a pocket having a convex projection that mates with a concave depression of the apparatus during docking, and the medical diagnostic apparatus includes at least one electrically conductive contact that contacts an electrically conductive contact of the docking station during docking.