Contact Measurements of Blackbody Temperatures

The chapter is devoted to measuring the temperature of blackbodies using contact thermometers with traceability to the International Temperature Scale of 1990 (ITS-90). The main types of contact temperature sensors (platinum resistance thermometers, thermistors, and thermocouples) applicable to measuring the blackbody temperature are reviewed. Some sources of systematic errors in contact temperature measurements of blackbodies are discussed. The techniques for measuring the temperature distributions over the radiating surfaces of blackbodies by means of movable and fixed contact thermometers are considered.