Inter-Comparison of Blackbody Sources Using IR-Radiation Pyrometer in the Temperature Range from 50 °C to 500 °C

In the present study a comparison between two different thermal sources maintaining near blackbody conditions has been carried out in the range from 50 °C to 500 °C. An infrared radiation pyrometer of make Land Pyrometer, Japan was used as a transfer standard to measure the temperature of blackbodies. The expanded uncertainty in the estimation of temperature of the radiating source in the above range of measurement was evaluated to be within ±1.03 °C, which shows that the radiation temperature sources are suitable for calibration of infrared total radiation pyrometers and thermal imaging devices in the operational range from 50 °C to 500 °C for laboratory and other industrial applications.