Mass flow meter for cryogenic fluid

Details Mass flow meter for cryogenic fluid Mass flow meter for cryogenic fluid

1975-05-12

1976-09-14

Queisser, Richard C.

Measuring and testing

Volume or rate of flow

System

73231M, G01F 186

Patent

active

039799530

ABSTRACT:
A mass flow meter including a fluid volume indicating means for measuring the volume of a fluid, a temperature sensor for indicating the temperature of the fluid being measured by the fluid volume indicating means, a density compensator connected to the volume indicating means and the temperature means to provide an indication of mass flow rate of the fluid material, and counting means to accurately accumulate the indication of mass units to provide the total mass of the fluid being measured. The signal output of the volume indicating means and the temperature sensor from the temperature sensor provide input pulses to the variable pulse width means in the density compensator to initiate an output measuring envelope pulse and to cut off the output measuring envelope pulse. The envelope pulse is an input density compensated envelope pulse to the counting means. The density compensator includes an oscillator producing a high frequency output to the counter means. The counter accumulates through the output of the density compensator the mass flow data to provide an indication of total mass of the fluid measured.

REFERENCES:
patent: 3425274 (1969-02-01), Clement et al.
patent: 3537312 (1970-11-01), Moore
patent: 3666928 (1972-05-01), Burke et al.

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