Why do clinical thermometer range between 35 degree celsius to 45 degree celsius?

Clinical thermometers are designed to measure body temperatures in the range of 35 to 45 degrees Celsius because this range encompasses normal human body temperatures, which typically fall between about 36.1 to 37.2 degrees Celsius. The upper limit of 45 degrees Celsius accounts for potential fever or hyperthermia, while the lower limit reflects the possibility of hypothermia. This range ensures that the thermometer can accurately assess the thermal state of patients in clinical settings.