Digitalization and the use of data has an increasing impact on commercial shipping and the maritime industries. But while the machinery on board is very well equipped with sensors and transmitting relevant data since years, logbooks and obligatory reports are often still written with word or excel sheets or even by hand on printed templates.

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A German research institute active in metrology has developed a measurement system for the determination of very small flow rates for the calibration of gas flow meters. For the calibration of smallest flow rates (<0.1 ml/min), a piston system for volumetric flow determination is set up, where a liquid with low vapor pressure can be introduced above the seal of the vertically moving piston. The uncertainties usually arising from thermal input during this measuring process are minimized.

A German national research institute active in metrology has developed a measurement process, which enables the efficient measurements of strong curved spherical segments which are often used in optical measurement equipment. Measurement uncertainties due to thermal expansion of the measurement equipment are reduces by at least factor 2. The method uses an interferometer signal coming from the front onto the spherical surface to be measured. In the center (on the optical axis) a phase value is determined, which is determined down to half a wavelength (typically the wavelength is 632 nm).