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Re: IR thermometers, the temperature measurement is related to surface emissivity (basically the fraction of heat that gets radiated as light), which can be pre

Re: IR thermometers, the temperature measurement is related to surface emissivity (basically the fraction of heat that gets radiated as light), which can be pretty variable between people (skin grease, cosmetics, sweat). As well as variability in blood flow etc. if it's a forehead measurement. In the antigen test strip case one would hope the materials and lighting to be controlled, so less risk of miscalibration (even if it's a stupid way to satisfy somebody's demand for a test to be made "quantifiable")

simion314 5y ago
>Re: IR thermometers, the temperature measurement is related to surface emissivity (basically the fraction of heat that gets radiated as light), which can be pretty variable between people (skin grease, cosmetics, sweat). As well as variability in blood flow etc. if it's a forehead measurement. I tried different areas of the body too like cheeks, hands, neck. I did not know that there is such a chance that a new, expensive device can have such an issue, I trusted this device because worked on me and I was worried a few days why the fever is not going down (it was COVID so it was a tense situation). I did not found in the manual of the device or in my online searches at that time cases where same device can have such a variation from person to person. As a conclusion I would advice to also keep a contact thermometer in the house, and double check the IR one(there will be some differences depending the place where you use the thermometer so one should keep that in mind)