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  • Quantum sensors: Measuring even more precisely

    Two teams of physicists led by Peter Zoller and Thomas Monz at the University of Innsbruck, Austria, have designed the first programmable quantum sensor, and tested it in the laboratory. To do so they applied techniques from quantum information processing to a measurement problem. The innovative met more

  • Groundbreaking method to map the interaction between atomically thin layers

    When two atomically thin layers of a material are stacked and twisted slightly on top of one another, they can develop radically different properties. They may become superconducting or even develop magnetic or electronic properties due to the interaction of their two layers. The challenge for scien more

  • Original kilogram replaced

    In addition to Ampere, Kelvin, Mol and Co., the kilogram also is now defined by a natural constant. In concrete terms, this means that the original kilogram, which has been the measure of all things for 130 years, has now served its purpose in Paris. This is made possible by the single crystals grow more

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Videos Metrology

Everything different, Nothing changes

During the last several years, Mettler-Toledo has been privileged to participate in several strategic partnerships that have contributed to the newly established and highly stable kilogram definition. This video explains the background of the 1 kg redefinition and the effect this change will hav ... more

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q&more articles Metrology

  • The importance of traceability in laboratory medicine

    World Metrology Day is celebrated annually on the 20th of May and this year’s focus on health provides an opportunity to emphasize the importance of comparable and reliable measurement results in laboratory medicine. more

  • Natural constants take center stage

    The 20th of May 2019 is a special day. From that day on, the old definitions of what a kilogram, a mole, an ampere and a kelvin represent, are history. The future of the International System of Units will see natural constants play the star roles. more

  • The traceability of measurement results

    Metrological traceability is necessary for consistent, comparable and valid measurement values. As a fundamental concept of modern-day metrology, it allows measurement results to be internationally recognized and is required by norms and accreditation standards all over the world. The traceability of measurement results also carries significance for business and liability issues. more

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Authors Metrology

  • Prof. Dr. Joachim H. Ullrich

    Joachim Ullrich, born in 1956, studied geophysics and physics at the University of Frankfurt where, after graduating in 1983, he also completed his doctorate in 1987 and qualified as a professor in 1994. From 1989 to 1997 he worked as a research assistant at the Gesellschaft für Schwerionenforschung more

  • Christian Müller-Schöll

    Christian Müller-Schöll, born in 1966, studied mechanical engineering at the University of Stuttgart, Germany, and graduated as Diploma-Engineer. At the ZHAW Zurich University of Applied Sciences he obtained a certificate for Integrated Risk Management. He headed the primary mass calibration laborat more

  • Dr. Klaus Fritsch

    Klaus Fritsch is Manager Compliance of the Global Business Area “Laboratory Weighing” within Mettler-Toledo. He has been with Mettler-Toledo since 2005, acting as senior metrologist and consulting the industry to achieve compliance with applicable regulations when using weighing instruments. He rece more

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