optris BR 20AR, Operator'S Manual

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Fever Detection 23
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4 Fever Detection
There are essentially two different methods for detecting possible persons for fever with a thermal imaging
camera:
Individual screening or Crowd based screening . The most suitable method depends on various
factors (such as the installation location).
4.1 Crowd based screening
The IR camera is monitoring a crowd of people at once or sequential. Assuming that the majority of the
measured maximum head temperature values are coming from healthy individuals the exceptions with an
elevated body temperature can be easily detected.
4.2 Individual screening
This method is mainly used at control gates or where crowd screening is not possible. The Medial Canthus
(tear duct) provides the strongest correlation between outside skin temperature and core body temperature
and is measured more precisely from a close distance. This method is also best for detecting low grade fevers.