Pyroelectric radiometer for intermediate IR radiation

We develop and test a pyroelectric IR radiometer which is designed for the control of temperature regimes of machine components fabricated on a production line. The temperature control is realized by registering the thermal radiation of heated components in the spectral range 8-12 μm using a pyroelectric radiation sensor. The chosen spectral range makes it possible to operate in conditions of increased humidity and smoke content, and also in the presence of cinder on the components. In the range of measured temperatures 100-1000°C, the error of measurements is ±1-3%, and in the range 1000-1300°C ± 1%. The device operates at a distance from the heated components from 1 to 5 m, and has an internal temperature-calibrated indication system. We foresee the output to a pen recorder, and an inclusion of generators of induction heating in the feedback circuit for the power control.