Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1985-06-14
1986-12-16
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
73204, G01F 168, G01F 170, G01P 518
Patent
active
046287434
ABSTRACT:
Apparatus for accurately metering liquid flow based on the injection of a brief heat pulse into the flowing stream, e.g., via a miniature thermistor, and detection of an electronic time derivative of temperature downstream with, e.g., a second microprobe thermistor. This detection triggers a subsequent heat pulse and the cycle repeats, with pulse total corresponding to elapsed liquid throughput, and pulse frequency to flow rate.
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Miller, Jr. Theodore E.
Small Hamish
Goldstein Herbert
The Dow Chemical Company
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