Brochures on the International System of Units (SI)

The seven base units of the International System of Units (SI) form the basis of almost all of PTB's work. If you would like to know more about the SI or the units, please take a look at our extensive selection of free brochures and journals on this subject.

You can download the Info sheets as a pdf file or order free of charge at PTB if aviable.

Title Die gesetztlichen Einheiten 2019 digital

The Legal Units in Germany

This brochure is being revised at the moment and will be available again at the end of 2019.

Die gesetzlichen Einheiten, 2. Auflage 09/2020 (1.2 MB)

The new International System of Units (SI)

The idea - The experiments - Trouble with the kilogram - The event - The news SI at school - the news SI in science - The new SI in technology - The new SI in public life

Das neue Internationale Einheitensystem (650 kB)

Experimente für das neue Internationale Einheitensystem (SI)

(in German only, English issue will follow)

PTB-Mitteilungen 2/2016, 116 Seiten, 2016.

In ihrem eigenen Fachjournal, den PTB-Mitteilungen, beschreiben Wissenschaftler der PTB die entscheidenden Experimente und den generellen Forschungsstand zum neuen Internationalen Einheitensystem.