the present disclosure provides a tympanic thermometer including a heat sensing probe defining a longitudinal axis and an outer surface extending from a distal end of the tympanic thermometer . the heat sensing probe includes a sensor housing extending to a distal end thereof . a sensor can is mounted with the sensor housing and a nozzle is mounted onto the sensor housing . the sensor can includes temperature sensing electronics for sensing temperature via the heat sensing probe . the nozzle includes a base disposed with the sensor housing and an elongated cylindrical nose portion disposed about the sensor housing . the nozzle is configured to direct heat flux to the distal end of the heat sensing probe . a probe cover is mountable to the distal end of the tympanic thermometer . the probe cover has an inner surface configured to engage an outer surface of the nozzle . the sensor can preferably include a lip extending radially therefrom and contacting the nozzle at at least one contact point to provide heat flux to the sensor can .