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Quantum technology

Quantum technologies are widely on the rise towards becoming part of daily life. Super sensitive sensors in medicine and technology as well as ultra-stable and precise optical atomic clocks are already examples of their applications. PTB plays a leading role worldwide in many of these areas.
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News & press releases

Lorentz experiment at PTB

Testing the symmetry of space-time by means of atomic clocks

With two optical Ytterbium clocks, PTB researchers have confimed the hypothesis that the uniformity of space time also apply to particles. The results are published in Nature.

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Dein genauester Sommer!

Die PTB bietet anspruchsvolle Forschungspraktika für Studierende an. Die Themen reichen von der Erzeugung und Abfrage von Qubits für Atomuhren bis zur interferometrischen Längenmessung. Die Bewerbungsfrist beginnt am 1. März und endet am 30. April 20

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Zeitübertragung über das öffentliche Telefonnetz

Die Deutsche Telekom hat angekündigt, den Anschluss des Telefonzeitdienstes der PTB, Rufnummer 0531 512038, Ende Februar 2019 auf IP-basierte Telefonie umzustellen. Die PTB empfiehlt, bestehende Systeme über eine zusätzlich geschaltete, IP-basierte Leitung zu testen.

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Das Logo des neuen Zentrums

New German-Japanese Cooperation for Highest Precision

In the new MPG-PTB-RIKEN Centre for Time, Constants and Fundamental Symmetries, experimental physicists with a passion for precision will jointly tackle forefront topics in fundamental physics.

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Event Calendar

Current Publications

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.

PTBnews 1.2019

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.
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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.
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PTB-Mitteilungen 4.2017

PTB-Mitteilungen 4.2017

Issue 4: Metrology for the Digitalization of the Economy and Society
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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.
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News from the divisions

SimOptDevice: a library for virtual optical experiments [ more ]

Erfolgreicher Vergleich zwischen leitungsgebundener und Freiraum-Leistungsmessung im Millimeterwellenbereich [ more ]

Erfolgreicher Vergleich zwischen leitungsgebundener und Freiraum-Leistungsmessung im Millimeterwellenbereich [ more ]

PTB und Bundesnetzagentur unterstützen durch gemeinsames Handeln den Rollout eichrechtkonformer Ladeinfrastruktur in Deutschland [ more ]

Einführung eines multiplen Transferstandards (MTS) für die LED-Messtechnik [ more ]

Auf dem Weg zu einer konsistenten Nomenklatur - Normen für die UV Radiometrie [ more ]

Gitterparametermessung von Silizium [ more ]

Weiterentwicklung der Strahlcharakterisierung für interferentielle Längenmessungen [ more ]

Optische Formmessung mit einer Multizeilenkamera [ more ]

Transmissionmessungen an Mikroskopobjektiven [ 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.