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Raise the curtain!

It will be time to raise the curtain on 20 May 2019. On that day, the new system of units will go into effect. Until that day, revolutionary work will be happening behind the scenes: the definitions used up to now will become invalid, and constants of nature will become the foundation of all of the base units. Adieu, international prototype of the kilogram!
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Poster zum Weltmetrologietag 2018

Countdown für Kilogramm, Kelvin und Co.

Mit dem diesjährigen Weltmetrologietag (wie immer am 20. Mai) startet der Countdown für den fundamentalen Wandel beim Internationalen Einheitensystem (SI). In einem Jahr, am 20. Mai 2019, tritt das neue oder revidierte SI dann in Kraft.

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Laseraufbau

En route to the optical nuclear clock

Researchers from PTB have, together with colleagues, performed measurements of the thorium-229 nuclear properties, thus allowing an optical nuclear clock to be realized that “ticks” more precisely than present-day atomic clocks.

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Stephan Weil mit Siliziumkugel

Ministerpräsident Weil zu Gast bei der PTB

Bei seinem Besuch in der PTB bekam Stephan Weil einen Eindruck von der großen thematischen Bandbreite der PTB und diskutierte mit dem Präsidium über wissenschaftspolitische Themen von beiderseitigem Interesse.

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Vakuumsystem für die Testumgebung am neuen Strahlrohr

Light for the technology of the future

For test measurements, the Physikalisch-Technische Bundesanstalt (PTB) and the world's largest supplier of lithography systems for the semiconductor industry, the Dutch company ASML, have put a new test beamline into operation at BESSY II in Berlin.

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PTB News 3.2017

PTB News 3.2017

Three times a year, PTB News provides topical information from the varied spectrum of activities of the Physikalisch-Technische Bundesanstalt (PTB) consisting of fundamental research, legal metrology and PTB's various activities in the service of the economy.
maßstäbe 13 (in German only)

maßstäbe 13 (in German only)

This issue of maßstäbe ("Alltag in Maßen" - "Everyday Measurements") invites you to a journey which starts in our body and does not end in all sorts of networks.
PTB-Mitteilungen 4.2017

PTB-Mitteilungen 4.2017

Issue 4: Metrology for the Digitalization of the Economy and Society
After nearly 130 years of service, the international prototype of the kilogram is expected to be retired in the fall of 2018 (at the General Conference on Weights and Measures). The Avogadro experiment, which aims to determine the number of atoms contained in a near-perfect silicon sphere, is a cornerstone of the redefinition of the kilogram.

Titelseite JB 2017

The Annual Report is published every spring and reports on PTB's work in the past year. The full version is to be found here on the Internet; excerpts from it are also available as a printed brochure.

Einsatz eines Array Spektralradiometers für die Erfassung der Ozonsäule durch Messungen direkter solarer Bestrahlungsstärke im UV-Bereich [ more ]

Integration des neuen Elektronenstrahl-Lithographiesystems in die Probenfertigung [ more ]

Auf dem Weg zur optischen Kernuhr [ more ]

Determination of the relativistic redshift of atomic clocks at the level of 10-18 [ more ]

Deutsches Nationales Komitee stellt sich neu auf [ more ]

Helmholtz Prize 2018 for electrical quantum metrology [ more ]

Light for the technology of the future [ more ]

Doctoral Candidate at PTB wins CC UPOB Young Scientist Award [ more ]

PTB Open Access Repository: first research dataset published [ more ]

Workshop for the WERAN Project - Interaction of Wind Turbines with Terrestrial Navigation and Radar [ more ]

PTB - The National Metrology Institute of Germany

PTB's profile of tasks

In Braunschweig and Berlin, time comes from atomic clocks, lengths are measured far into the nano-world, scientists do research on fundamental questions concerning the physical units, and the employees in the laboratories calibrate measuring instruments, meeting the most demanding requirements. Therefore, the Physikalisch-Technische Bundesanstalt is among the top names in metrology worldwide. As Germany's national metrology institute, PTB is Germany's highest authority when it comes to correct and reliable measurements. It is the supreme technical authority of the Federal Ministry for Economic Affairs and Energy (BMWi) and employs a total of approx. 1900 staff members. PTB operates an integrated Opens internal link in current windowquality management system which covers the four interlinked field of business. (Initiates file downloadSelf-Declaration on quality management).

Corporate logo of the Federal Ministry for Economic Affairs and Energy

The Physikalisch-Technische Bundesanstalt, the National Metrology Institute of Germany, is a scientific and technical higher federal authority falling within the competence of the Federal Ministry for Economic Affairs and Energy.