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My portable and online IR thermometers indicate different temperatures which one is right?

April 26, 2017different indicate IR online portable right temperatures thermometers

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My portable and online IR thermometers indicate different temperatures which one is right?

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Usually the problem is emissivity. The portable is not the same wavelength as the on line instrument. You need to set the correct emissivity for both instruments…and it may not be the same value.