Product category:
Temperature measurement: IR techniques
News Release from: Impac Infrared | Subject: Emissivity Enhancer
Edited by the Processingtalk Editorial
Team on 19 October 2005
Emissivity enhancer for shiny,
reflective surfaces
Temperature measurement of shiny, highly reflective metal surfaces has always been problematic for infrared thermometers due to their very low emissivity, particularly at low temperatures
Temperature measurement of shiny, highly reflective metal surfaces has always been problematic for infrared thermometers due to their very low emisivity, particularly at low temperatures To overcome the difficulties in making such measurements IMPAC have developed an "Emissivity Enhancer", which makes these measurements much easier and more accurate
This article was originally published on Processingtalk on 31 Jul 2003 at 8.00am (UK)
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The emissivity enhancer is a gold plated concave mirror, which is mounted quite close to the measuring object.
Due to multiple internal reflections between the measuring object and the emissivity enhancer the infrared energy is "mechanically" increased.
The pyrometer measures this mechanically increased energy through a small hole in the concave mirror.
Additionally the emissivity enhancer shields the measuring object against interfering radiation from other sources.
Consequently it significantly improves the results of temperature measurements near to ambient temperature.
The emissivity enhancer allows non-contact temperature measurements on objects, which previously could not be measured due to their specific material properties (eg an extremely low emissivity).
The emissivity can be fitted to most of the standard IMPAC Infratherm infrared thermometers.
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