This document presents the results of the working package ''Preliminary Component Development'' under the project ''Refueling of Orbital Platforms'', while the present Part 2 specifically addresses the preliminary development of a flow meter for orbital applications. Starting from a literature and patent search into the state of the art in this field, methods are described, which can be used to determine flow rates under orbital conditions. In addition to this, breadboard models were designed, built and tested, and furnished proof of their functionality for this specific area of applications. (orig.)SIGLEAvailable from TIB Hannover: F95B175+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman