04484479 is referenced by 49 patents and cites 20 patents.

Gas flow metering using a capacitance measurement and comprising a taut elastomeric membrane, preferably tubular in form, which expands or contracts as a function of flow rate past it to an extent determined by Bernouilli's principle. The thus changing distance between this membrane and one or more external electrodes measured by capacitance change or other means is correlatable with the instantaneous flow rate and such measurement can be made essentially without regard to entrained solids or liquids in the gas flow, phase and temperature changes (moderate) within the gas flow or mixture or changing composition therein and with rapid response and low back pressure.

Title
Gas flow metering
Application Number
5/893679
Publication Number
4484479
Application Date
April 5, 1978
Publication Date
November 27, 1984
Inventor
Richard Eckhardt
c/o ECD Corp., 196 Broadway, Cambridge, 02139
MA, US
Agent
Jerry Cohen
IPC
G01F 1/38
G01L 9/12
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