Measuring and testing – Gas analysis – By vibration
Patent
1976-09-09
1977-12-13
Queisser, Richard C.
Measuring and testing
Gas analysis
By vibration
62 49, 73 611R, G01N 2518
Patent
active
040622231
ABSTRACT:
A monitoring system for determining the volumetric percentage of liquid nitrogen in a quantity of liquified natural gas (LNG) whose composition of liquified hydrocarbon gases is known, and which is stored at atmospheric pressure. The system includes a device, such as a temperature-dependent resistor connected to a power source, for producing an electric signal proportional to the temperature of the liquified gas. This temperature signal is subtracted from a reference signal which is equal to the temperature signal when the liquified natural gas does not contain any nitrogen, and which can be produced by a device such as a precision resistor connected to the power source. The differential signal output of the temperature and reference signals will be proportional to the volumetric percentage of nitrogen in the liquified natural gas, and a standard readout device, such as a voltmeter, can be calibrated to read the volumetric percentage of nitrogen from this differential signal.
REFERENCES:
patent: 2594683 (1952-04-01), Rolfson
patent: 3383881 (1968-05-01), Bailey
patent: 3695095 (1972-10-01), Lineburg
patent: 3926038 (1975-12-01), Wunning et al.
patent: 3964037 (1976-06-01), Lamphere
Rovinskii, "A Liquid Helium Level Indicator", Cryogenics, p. 115, 12-1961.
Lamphere David A.
Weitz, Jr. Paul G.
Greigg Edwin E.
Kreitman Stephen A.
Queisser Richard C.
Simmonds Precision Products Inc.
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