Caregivers---from the home to the hospital and everywhere in between---use fever thermometers to measure internal body temperature. Many of them have come to rely on digital thermometers to give them a fast, accurate reading of a patient's body temperature. Older, glass tube thermometers use the tendency of matter to expand as temperature rises (thermal expansion) to determine temperature; their space age digital decedents rely instead on a "thermistor" to determine temperature by measuring electrical resistance. The thermistor in a digital thermometer acts as a as a temperature-sensitive electric resistor. At low temperatures, a thermistor will not conduct electricity, but as its temperature rises, the thermistor's state changes and it becomes more and more conductive. Thermistors used in digital fever thermometers undergo this change in conductivity (resistance) at temperatures near 98° F.
More items… Can you submit more information?