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Development of a Dosing Concept for Minute Flow Rates
Author(s) -
Kießlich F.,
Prechtl P.M.,
Gerhard H.,
Liauw M.A.,
Popovska N.,
Emig G.
Publication year - 2004
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200400039
Subject(s) - calibration , volume (thermodynamics) , volumetric flow rate , flow (mathematics) , range (aeronautics) , flexibility (engineering) , process engineering , mechanics , control theory (sociology) , computer science , materials science , mathematics , thermodynamics , control (management) , engineering , physics , composite material , statistics , artificial intelligence
Pressure and volume flow control is a non‐trivial problem in the range of minute molar fluxes. Requirements with regard to precision, stability and flexibility go beyond the specifications of commercially available systems. The present concept offers a functional solution for flexible dosage of norm volume flows down into the μL flow range providing at the same time a suitable pressure control. Furthermore an opportunity for in situ calibration of capillaries concerning their length and inner diameter is introduced. The described setup, after calibration, provides the possibility to determine the unknown viscosity of gaseous mixtures, which are very sparsely found in literature.