Measuring and testing – Gas analysis – By vibration
Patent
1982-11-03
1984-08-14
Woodiel, Donald O.
Measuring and testing
Gas analysis
By vibration
324204, G01N 2700
Patent
active
044649266
ABSTRACT:
A sensor for sensing the presence of oxygen in a test gas mixture comprises either first or second tubes for the separate flow of a measured gas and a gas to be tested for a single tubular arrangement for the successive flow of these two gases in association with a plurality of radio-frequency coils which are connected in an electrical bridge circuit to that they can be balanced in any variation of the inductance measure. Since oxygen in the gas produces a paramagnetism which provides induction variations in the coils of the balancing circuit, the variations of the balancing circuit may be used to sense the proportion of the oxygen content in the gases. With the inventive method the gases are passed into association with the balancing circuit and variations of the test gas from the measured gas are sensed by the circuit balance which is produced by the oxygen which is present in the gas mixtures. Such a sensor may be used for breath protection, diving and medical fields.
REFERENCES:
patent: 2729097 (1956-01-01), Cherrier
patent: 2957128 (1960-10-01), Spry
patent: 3479860 (1969-11-01), Luft
Albarda Scato
Eder Alfred
Dragerwerk Aktiengesellschaft
Kovalick Vincent P.
Woodiel Donald O.
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