Virendra Haribhai Pansara

The thermometers determine temperature by measuring the heat emanating from the surface of a person’s body. Often, however, those wielding the tools don’t hold them close enough to the subject’s forehead, generating unusually low temperature readings, or hold them too close and get a high reading. The measurements can be imprecise in certain environments, like a dusty roadside, or when someone has taken medication to suppress a fever.