What is Infrared?

2020-03-12

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An infrared (IR) thermometer is a sensor that determines the temperature of an object by detecting and quantifying the infrared radiation emitted by measured target. An IR thermometer can be compared to the human eye. The lens of the eye represents the optics through which the radiation (flow of photons) from the object reaches the photosensitive layer (retina) via the atmosphere. This is converted into a signal that is sent to the brain.

Every form of matter with a temperature above absolute zero (-273.15°C / -459.8°F) emits infrared radiation according to its temperature. This is called characteristic radiation. The cause of this is the internal mechanical movement of molecules. The intensity of this movement depends on the temperature of the object.