Equations are derived to evaluate the effects of thermal vibration relaxation and specific-heat changes on pneumatic-probe pyrometer measurements in the region 1000 to 3000 degrees K and 0.3

In modern industry the thermocouple plays an important role in temperature instrumentation. The increasing need for temperature measurements in extreme environments has produced significant advancements in thermo couple technology; much of this technology has come from research in the aerospace and atomic energy areas. This survey reviews developments resulting from work performed by the National Aeronautics and Space Administration (NASA) and its contractors. The main thrust of the survey is to encourage non-aerospace applications of the results of aerospace research.