Measurement of mass of fluid in a container
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United States of America Patent
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Mar 3, 1992
Grant Date -
N/A
app pub date -
May 8, 1990
filing date -
May 12, 1989
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The mass of fluid remaining in a container 10 is determined by switching on a series of heating elements 14 and sensing the temperature of the container and contents over a period of time using sensor 16, thereby to deduce the thermal time constant. The thermal time constant is used to determine the mass of the remaining fluid contents from a look-up table or other means. In an alternative arrangement, the thermal response on cooling may be used in a similar manner.
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