The Physikalisch-Technische Bundesanstalt (PTB) is the German national metrology institute providing scientific and technical services. It is the highest technical authority under the auspices of the Federal Ministry of Economics and Technology (BMWI).

Metrology is the core competence of PTB, measuring with highest accuracy and reliability. PTB performs fundamental research and development work in the field of metrology as a basis for all the tasks entrusted to it in the areas concerning the determination of fundamental and natural constants, the realization, maintenance and dissemination of the legal units of the SI, safety engineering, services and metrology for the area regulated by law and for industry, as well as technology transfer.

PTB was founded in 1887 as the Physikalisch-Technische Reichsanstalt on the basis of the ideas of Werner von Siemens and Hermann von Helmholtz and on their joint initiative. It is the second-largest metrological institute in the world. The traditional site of PTB is in Berlin-Charlottenburg. Since 1947, PTB has been residing in Braunschweig.

PTB has a staff of about 1,900. In eight scientific departments (six in Braunschweig, two in Berlin) equipped with a unique scientific and technological infrastructure research is performed in engineering and natural sciences. As one of the top measurement institutions in the world PTB sits at the intersection between scientific research and real world applications. PTB’s physicists, engineers, mathematicians, and chemists are making pioneering research that paves the way for innovation and fair trade, ensures consumer protection and underpins patient safety.

For more information, please visit the PTB website.