Emissivity enhancer boosts IR accuracy
An
Impac Infrared product story
Edited by the Engineeringtalk editorial team
Oct 21, 2005
Temperature measurement of shiny, highly reflective metal surfaces has always been problematic for infra-red thermometers due to their very low emissivity, particularly at low temperatures.
Temperature measurement of shiny, highly reflective metal surfaces has always been problematic for infra-red thermometers due to their very low emissivity, particularly at low temperatures.
To overcome the difficulties in making such measurements Impac has developed an "emissivity enhancer", which makes these measurements much easier and more accurate.
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 infra-red 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 noncontact 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 infra-red thermometers.
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Contact Impac Infrared
Tel +44 1246 269066
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