METHODS OF MEASURING TEMPERATURE
It is important to remember that the body temperature reading depends on the site where it is
measured. For this reason the measurement site must always be specified in order to ensure
that the correct temperature reading is recorded.
IN THE RECTUM (RECTAL)
This is the most accurate method from a medical point of view, because it comes closest to
the core body temperature. The thermometer tip is inserted carefully into the rectum for a
maximum 2 cm. The usual measuring time is around 40 to 60 seconds.
UNDER THE ARM (AXILLARY)
Placing the thermometer in the armpit provides a measurement of the surface temperature
that can fluctuate by around 0,5°C to 1,5°C from rectal temperature readings in adults. The
usual measuring time for this method is approximately 80 to 120 seconds. It should be noted
that an exact reading won’t be obtained if, for example, the armpit temperature is lower than
normal (the armpit temperature has been cooled down). If in this case we recommend
extending the measurement time by around 5 minutes in order to obtain the most precise
possible reading that corresponds as closely as possible to the core body temperature.
IN THE MOUTH (ORAL)
There are different heat zones in the mouth. As a general rule, the oral temperature is 0,3°C to
0,8°C lower than the rectal temperature. To ensure the reading is as accurate as possible,
place the thermometer tip to the left or right of the root of the tongue. The thermometer tip
must have constant contact with the tissue during the reading and be placed under the
tongue in one of the two heat pockets at the back. Keep the mouth closed during the reading
and breathe evenly through the nose. Do not eat or drink anything before the measurement.
The usual measuring time is appromimately 50 to 70 seconds.
Note: We strongly recommend the rectal method as the most accurate method for identifying
the basal temperature and advise you to extend the measuring time by 3 minutes after the
beep.
CLEANING AND DISINFECTION
The best way to clean the thermometer tip is by applying a disinfectant (e.g. 70% medical
alcohol) with a damp cloth. It shall be disinfected before each use.
Waterproof thermometers can be immersed in liquid or lukewarm water for through cleaning
and disinfection.
SAFETY PRECAUTIONS
• Do not allow the device to come into contact with hot water
• Do not expose to high termperatures or direct sunlight
