Paramagnetic oxygen sensor

Details Paramagnetic oxygen sensor Paramagnetic oxygen sensor

1984-08-21

1986-01-14

Kreitman, Stephen A.

Measuring and testing

Gas analysis

By vibration

73 27A, 7386127, G01N 2902, G01R 3312, G01F 166

Patent

active

045638942

ABSTRACT:
Apparatus comprising a test chamber, an electric solenoid and a pressure detector is provided to measure the partial pressure of oxygen contained in a mixture of gases. As a result of the paramagnetic properties of oxygen, an acoustic wave is produced in the gas mixture by the application of a pulsed magnetic field. The magnitude of the dynamic acoustic wave is dependent on the amount of oxygen present in the gas mixture. The solenoid generates a pulsating magnetic field in response to an electric signal provided by a signal source. The pressure detector measures the magnitude of the resulting acoustic wave and provides a signal whose amplitude is directly proportional to the amount of oxygen present in the sample gas.

REFERENCES:
patent: 2416344 (1947-02-01), Pauling
patent: 3584499 (1971-06-01), Hummel
patent: 3616679 (1971-11-01), Meyer et al.
patent: 4173975 (1979-11-01), DeLong et al.
patent: 4403186 (1983-09-01), Kotani et al.
patent: 4480483 (1984-11-01), McShane

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