High-Resolution Pyrometers for Thermophysical Scientific Experiments

An accurate temperature measurement is of a great importance in most modern researches on thermophysical properties of materials. Two high-resolution automatic pyrometers for real-time monitoring of surface temperature in thermophysical experiments, such as 'laser-flash' method or during single-crystal growth from a melt are described. The developed pyrometers measure temperature in a wide dynamic temperature range from 400 to 2900 deg C at a typical resolution of 0.02 deg C, and a response time up to 100 mus. The main details of the pyrometers' design, calibration and performance are presented.