While 'fever detectors' or 'fever cameras' are now hotly marketed, FLIR has gone the other way. While FLIR never called these devices by those terms, they have become even more conservative, rejecting even 'EBT', now calling them 'EST'.
In this note, we examine:
The various marketing terms for this thermal technology
Why FLIR switched from EBT to EST
What the difference between body temperature and skin temperature is
What the difference between forehand and inner canthus measurements are
The relationship between EST, EBT, fever, and coronavirus