The origins of fiberoptic thermometry, its strengths and limitations and the
general characteristics of its commercial applications are discussed. Three
classes of measurement systems are considered as commercial: (1) those
employing point sensors for measurement of low to intermediate temperatures;
(2) those employing point sensors for measurement of intermediate to high
temperatures; and (3) those employing distributed sensors. The principal
technologies in each class are reviewed and specific applications are then
examined. Finally, future developments are suggested.