|Measuring Range||-110 to 20 Deg C|
“Elevated human body temperature, or fever, is often a reliable indicator of many serious infections”.
Detecting Body Heat
Infrared light is emitted from the human body in the form of heat. We cannot see it with the naked eye since it emits light at a different wavelength. On the electromagnetic spectrum, there is a wide range of frequencies from low frequency radio waves to high frequency gamma rays. The part of the spectrum that we can see falls under visible light. In theory, the more heat a body radiates the more infrared light can be detected.
It is for this reason that infrared sensors are used for heat scanners. The sensors detect the amount of heat being emitted by its color. The color is actually not how it would appear in visible light, but more for the purpose of identifying the temperature of the body. Computer algorithms are used to generate a color palette that represents the scale in temperature. For example, the higher temperatures can be highlighted with a different color palette compared to lower temperatures. Developers create a color palette for normal temperature below 36–37° Centigrade (98–100° Fahrenheit). For temperatures above 37° Centigrade, having a different color will alert screeners.