TY - JOUR A1 - Hartmann, Jürgen T1 - A comparison of the blackbody cavities for infrared ear thermometers of NMIJ, NPL, and PTB T2 - AIST Bulletin of Metrology N2 - A comparison of the NMIJ, the NPL, and the PTB blackbody cavities for infrared ear thermometers has been performed for the first time. The NMIJ and the PTB have transported their standard blackbodies to the NPL and radiance temperatures of the blackbodies of the institutes have been directly compared simultaneously using high-resolution infrared ear thermometers as comparators. The results of the comparison show that radiance temperatures realized by the NMIJ, the NPL, and the PTB cavities agree within +/-0.01 deg C, well within their uncertainty levels of around 0.04 deg C in the temperature range from 35 deg C to 42 deg C. Y1 - 2007 UR - https://opus4.kobv.de/opus4-fhws/frontdoor/index/index/docId/1834 VL - 5 IS - 4 SP - 251 EP - 256 ER -