In a laminar flow element the gas flow rate, which physical and transport properties are known, is based on measured pressure difference between the inlet and the outlet of the element, the absolute pressure and the temperature of the gas. In this diploma thesis, we set up a measuring system and created a control program using LabVIEW programming environment. The measuring system was used to measure the flow rates of dry air, for which we also evaluated the measurement uncertainty. The comparative measurements with the reference measuring system were used to analyse the obtained results.
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