A plurality of thermometer models are manufactured from a universal clinical thermometer core. The thermometer core includes a housing, a controller storing a software program, a power source, a probe, a probe cord, and a display. A plurality of model selection devices are produced, each corresponding to a different thermometer model. One of the model selection devices is selected and connected to the controller. The controller operates the thermometer as a function of the connected model selection device such that the thermometer is configured with the features and default settings of the thermometer model corresponding to the connected model selection device.
