Introduction
How Does it Work?
The Accu-Light 1-Second Ear Thermometer measures the level of infrared energy given off
by the eardrum and surrounding tissues and converts this energy into an oral equivalent
temperature.
Temperature From The Ear
Clinical research has shown that the ear is an ideal site for taking body temperature. The
eardrum shares the same blood supply with the hypothalamus, the part of the brain that
controls body temperature. Therefore, the ear is an accurate indicator of internal body
(core) temperature.
Practice Makes Perfect
We recommend that you practice with Accu-Light 1-Second Ear Thermometer on yourself
and family members when you are healthy. This way you can improve your technique and
obtain a reference temperature, which will make you feel more confident about the
measurements you take when a family member is ill.
Temperature Measurements Range, Oral and Rectal Temperatures
Many people believe that normal body temperature is 37.0°C (98.6°F). However, medical
research has shown that temperature, like blood pressure, varies from person to person
and from situation to situation. Factors affecting body temperature include age, gender,
physical activity, environmental temperature, clothing, medications, and time of day. Oral
temperatures may range from 35.8°C (96.4°F) to 38.0°C (100.4°F).
The Accu-Light 1-Second Ear Thermometer instantly obtains and averages 12
measurements, and gets the highest from 3 average data groups to provide an accurate
reading. It then converts the temperature measured in the ear to the commonly used oral
temperature. As the chart indicates, the range of normal displayed ear temperatures is
similar to the familiar range of normal oral temperatures taken with traditional oral
thermometers or ear thermometers set in the oral mode.
Years of Age
0-2
3-10
11-65
>65
The temperatures of children five years old or younger are often taken rectally, because
young children often have difficulty closing their mouths for an oral temperature
measurement. Oral temperature is normally 0.5°C (0.9°F) lower than rectal temperature.
2
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Normal displayed temperature by age
Celsius
36.4°C – 38.0°C
36.1°C – 37.8°C
35.9°C – 37.6°C
35.8°C – 37.5°C
Fahrenheit
97.5°F – 100.4°F
97.0°F – 100.0°F
96.6°F – 99.7°F
96.4°F – 99.5°F