Abstract: In 1987 the first laser-based emissivity measuringpyrometer was introduced. This instrument is currentlyin worldwide use in industrial and researchapplications. In 1990 a fiber optic version wasdeveloped; this provided broader temperature ranges,smaller target sizes, lower cost and most importantlyflexibility of sensor head size, shape and materials.Furthermore the fiber optic version meets therequirements for on-line IR temperature measurement andcontrol in metallurgical, chemical, ceramic andelectronics manufacturing where portable instrumentaccess is prohibited and where the sensor environmentis harsh.!8
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