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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bis zum Weltmetrologietag (20. Mai) des Jahres 2019, an dem das neue SI in Kraft tritt.
Countdown für Kilogramm, Kelvin und Co.
On Sunday, 10 June 2018, Dieter Kind died at the age of 88 in a hospital in Braunschweig after a brief but severe illness.
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Im Gruppenraum der Kita könnten bei kleineren Umbauarbeiten an einer Wand Asbestfasern freigesetzt worden sein, wenn auch nur in geringen Mengen. Vorsorglich wurde der Bereich mit einer Staubschutzwand abgegrenzt. Die genauen Analysen laufen derzeit.
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The focus of this year's World Metrology Day (20 May) is the fundamental change in the International System of Units (SI) whose countdown has startet now. In one year, on 20 May 2019, the new or revised SI is set to enter into force.
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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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311. PTB-Seminar zu aktuellen Fortschritten von Kalibrierverfahren im Nieder- und Hochfrequenzbereich 2018 [ more ]
IEEE UFFC Distinguished Lecturer von der PTB [ more ]
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 ]
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 
quality management system which covers the four interlinked field of business. (
Self-Declaration on quality management).
