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6. Some Useful Information
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As ambient temperature, sweat, or saliva easily affects body temperature measured under the
arm or the tongue, readings may be lower than the core temperature.
Tympanic temperature measurement accurately reflects the brain temperature and can lead to
a quicker detection of fever.
In order to make a correct judgement of suspected fever conditions, it is important to learn the normal
temperatures of family members by measuring their temperatures when they are in good physical condition.
The temperature measured in the ear is different to that measured rectally.
Please use the normal as the standard for understanding the temperature difference during fever.
One speaks of normal body temperature if the measurement value lies within a certain range. Body temperature
varies however according to age.
Age Normal ear temperature in °C and °F
Babies 36.4°C - 37.5°C 97.5°F - 99.5°F
Children 36.1°C - 37.5°C 97°F - 99.5°F
Teens/Adults 35.9°C - 37.5°C 96.6°F - 99.5°F
Elderly 35.8°C - 37.5°C 96.4°F - 99.5°F
Eardrum
Infrared sensor
Eardrum/Measure point
External auditory canal
Infrared rays