Glossary

Expert-System -

A type of artificial intelligence computer program that uses knowledge as well as inference to solve problems which are difficult enough that they would require significant human expertise to solve them; Created by translating knowledge gathered from experts into software code.

Multi-wavelength -

Using many wavelengths of radiation which can also be referred to as many colors of light in order to achieve a more accurate temperature reading.

Emissivity -

The most important information about emissivity is that the SpectroPyrometer calculates and corrects for emissivity without the operator ever having to consider it. Emissivity is the opposite of reflectivity. The power of a surface to emit radiation relative to an ideal emitter (a black body) at the same temperature as the surface. A black body does not reflect at all.  The ratio of the radiation emitted by a surface to the radiation emitted by a black body at the same temperature as the surface.

Relative Emissivity -

The most important information is that with a SpectroPyrometer you will never have to wonder or worry about relative emissivity. The ratio of the value of emissivity at the two wavelengths in question. A value required by ratio pyrometers to be input by the operator. It varies widely  with temperature, turbulence, target material, etc., and any pyrometer requiring this information to be input will produce incorrect temperature data.