Infrared Radiation Thermometry Near Room Temperature at NMIJ

Abstract

Facilities and calibration techniques for infrared radiation thermometry in the low temperature range have been developed at the NMIJ. The estimated uncertainties (k = 2) of the radiance temperature of the reference blackbody sources are better than 60 mK in the temperature range from -20 °C to 160 °C. A compact infrared radiation thermometer has been developed as a transfer instrument. The uncertainty of calibration of the industrial standard blackbodies has been estimated to be smaller than 0.1 °C.