Vilbaste, MartinTao, XiangwuTartu Ülikool. Loodus- ja täppisteaduste valdkond2025-05-092025-05-092024https://hdl.handle.net/10062/109091In this thesis, an easily operable initial measurement system for calibrating rotameters and thermal mass flow meters at flow rates (2…18) L/min is designed. The uncertainties affecting the calibration are also analyzed and the highest contributions are found to be due to the permissible error of the reference gas meter and leakage of the system. These findings provide a direction for further improvement of the measurement system in future.enAttribution-NonCommercial-NoDerivs 3.0 Estoniahttp://creativecommons.org/licenses/by-nc-nd/3.0/ee/rotameterthermal mass flow metercalibration, uncertaintyThesis