The attainable repeatability of the implemented sensor
prototype using correct calibration curves measured by 2.5 ◦C intervals
was better than ±0.5 ◦C in an operational temperature range
from +12.6 to +49.3 ◦C and a target range from +10 to +90 ◦C. Utilizing
the correct calibration curve is a necessity in order to attain
a repeatability of better than ±1 ◦C in the IR temperature measurement
with an operational temperature range of −40 to +80 ◦C and
a target temperature range of −40 to 120 ◦C required typically in
mobile devices.