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Capacitance probe for fluid flow and volume measurementsMethod and apparatus for making measurements on fluids are disclosed, including the use of a capacitive probe for measuring the flow volume of a material within a flow stream. The capacitance probe has at least two elongate electrodes and, in a specific embodiment of the invention, has three parallel elongate electrodes with the center electrode being an extension of the center conductor of a co-axial cable. A conductance probe is also provided to provide more accurate flow volume data in response to conductivity of the material within the flow stream. A preferred embodiment of the present invention provides for a gas flow stream through a microgravity environment that allows for monitoring a flow volume of a fluid sample, such as a urine sample, that is entrained within the gas flow stream.
Document ID
19960002226
Acquisition Source
Legacy CDMS
Document Type
Other - Patent Application
Authors
Arndt, G. Dickey (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Nguyen, Thanh X. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Carl, James R. (Lockheed Engineering and Sciences Co. Houston, TX., United States)
Date Acquired
September 6, 2013
Publication Date
March 8, 1995
Subject Category
Instrumentation And Photography
Report/Patent Number
NAS 1.71: MSC-22544-1
Accession Number
96N12234
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Patent
NASA-CASE-MSC-22544-1
Patent Application
US-PATENT-APPL-SN-400703

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