Phosphor thermometry can overcome challenges experienced by thermal imaging, but so far has a limited temperature range, and lacks widely accepted, validated calibration methods. The aim of this work package is to develop thermographic phosphor thermometry with a target uncertainty of less than 3 °C up to a temperature of 1250 °C, to provide low uncertainty traceable surface temperature measurement. It encompasses tasks aimed at advancing high-temperature phosphor thermometry in a robust metrological way.

• In the first task thermographic phosphor coatings capable of operating at temperatures up to 1250 °C will be developed.
• In the second task phosphor thermometry instrumentation capable of interrogating the newly developed high-temperature phosphor coating will be constructed, calibrated, and tested.
• The third task will involve practical demonstration of the newly developed phosphor thermometry capability (robust high-temperature coating and instrumentation) in targeted high-value manufacturing sectors, i.e., marine steel processing and induction heating of engineering alloys.