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The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute providing scientific and technical services. PTB measures with the highest accuracy and reliability – metrology as the core competence.
PTB is among the top names in metrology worldwide. As the National Metrology Institute of Germany, PTB is Germany's highest authority when it comes to correct and reliable measurements. Research and development work amounts to about two thirds of all of PTB's activities.