Partners

Institute for Process Measurement and Sensor Technology

In teaching and research, the Institute Process Measurement and Sensor Technology represents in particular the precise measurement of a wide variety of quantities according to the interference optical effect. Since the 1970s, laser interferometers have been developed here for the highly accurate determination of mass, force, pressure, acceleration and, of course, for geometric quantities such as length, angle and shape.

Such laser interferometers are the heart of nanopositioning and nanomeasuring machines for high-precision three-dimensional measurement of smallest structures in extended measuring ranges. Today, the laser frequency of such an NPM machine can be directly traced back to the SI unit second in our laboratory using modern frequency comb technology and thus stabilized to a relative uncertainty < 2E-12.

In 2018, the unit of mass, the kilogram was redefined and traced back to Planck's constant. In a joint project of the Institute for Process Measurement and Sensor Technology and the Physikalisch-Technische Bundesanstalt, a balance, the so-called Planck balance, was developed that can be used for mass determinations according to the new definition. Here, interferometers are used for high-precision velocity measurement.

True to the motto "Precision in Measurement", SIOS Meßtechnik GmbH develops and manufactures laser interferometric precision measuring instruments for measuring length, angle, vibration and straightness in measuring ranges up to 50 m with the highest resolution in the picometre range. 

Thanks to the high vertical range of manufacture, SIOS Meßtechnik GmbH distinguishes itself as a globally operating producer and supplier of customer-specific solutions for high-precision measuring and calibration devices for both science and industrial applications in a wide variety of fields.