In order to develop the National Measurement Standards in the field of photometry based on the new SI definition, NIMT represented by Dr. Rattana Chuenchom, Senior Professional Metrologist, Light and Color Group, Thermometry and Optical Metrology Department, visited the Physikalisch-Technische Bundesanstalt (PTB), Germany to deliver standard probes and conduct the informal inter-laboratory comparisons of Filter radiometer and Reference photometer with PTB during 24 February 2024 to 10 March 2024.
