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Author: Rudy J. Werlink
Source: 1995 International Symposium on Fluid Flow Measurement
Year Published: 1995
Abstract: The Quality-flow meter is based on measurement of the dielectric constant variation between die phases of a 2 phase mixture. As the ratio of the two phases changes the overall capacitance changes. Monitoring capacitance changes to measure a physical phenomenon is not a new concept. Indeed, a range of sensors have been developed which utilize capacitance measurements. The present system is not significantly mure sensitive than those available off-the-shelf, but demonstrates a significantly higher dynamic range and quick response than those of which this author is aware. Two prototype sensor designs have been fabricated. The First is a compact quality meter with real time display and remote data capabilities (Quality Meter I). The circuit is optimized for high sensitivity, and 1 second response. The second Prototype is a quality/ flow meter (Quality Meter II)- really two sensors in series for establishing the flow rate and the quality of two phase mixtures. If s circuit is optimized for fast response. Initial testing of the sensors has been successful.

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