Optical Pyrometry

Optical Pyrometry is a method of making non-contacting measurements of temperature inside the furnace. This is based on the principle that all objects above absolute zero emit electromagnetic radiation as a function of temperature. This relationship is defined by the Planck Equation, and based on this, the temperature of an object can be determined from a distance by measuring it's emitted radiation. The optical pyrometer measures this radiation and calculates the temperature of the object using the Plack Equation. With this powerful instrument, ESA is able to determine temperature profiles for various locations and elevations in the main furnace where temperature measuring techniques are limited.

Furnace exit gas temperatures can be obtained by contacting measurement techniques using a water-cooled probe.

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