Why is it advantageous to measure temperature in the ear with the Braun ThermoScan? Braun's ThermoScan measures the infrared heat emitted by the eardrum and surrounding tissue. Because the eardrum is supplied by the same blood vessels as the temperature control center in the brain, the ear accurately reflects changes in core body temperature. The Braun ThermoScan has been shown to be more accurate compared to rectal temperature measurement.*** The thermometer's probe can also be used for safe temperature measurement in newborns, as it does not need to be fully inserted into the ear canal for a precise measurement. Measurements to determine temperature changes. Nimah, Marianne M., et al.: "Infrared tympanic thermometry in comparison with other te...