Table 1.

The technical specification of used miniaturized thermal infrared (TIR) cameras.

Camera	Workswell WIRIS 2nd GEN	FLIR E8-XT
TIR Resolution	640 × 512 pixels	320 × 240 pixels
Field of View (FOV)	69° × 56° (focal length = 9 mm)	45° × 34°
Active sensor size of focal plane array (FPA)	1.088 × 0.8705 cm	-
Temperature ranges	−25 °C to +150 °C, −40 °C to +550 °C	−20 °C to +550 °C
Temperature sensitivity	0.05 °C (50 mK)	< 0.05 °C (50 mK)
Accuracy	±2 °C or ±2% of reading	±2 °C or ±2% of reading, for ambient temperature 10 °C to 35 °C
Spectral Range	7.5–13.5 μm	7.5–13.0 μm
Calibration	Yes
Detector type	FPA, uncooled vanadium oxide (VOx) microbolometer