not as far as i know, but they easily get confused by flat surfaces.
the flatter and more polished the worse it gets... remember they measure infra red radiation which is a spectrum of LIGHT... and most things that reflect visible light reflect IR as well. and many things that dont or barely reflect visible light reflect IR at least partially.
ive played around with those cams and meters and im taking those measurements with a grain of salt... ive had way way off readings with optical temp meters... maybe that one is clibrated fine and the temps are correct... i dont trust it though...
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