Optical paramagnetic/diamagnetic gas sensor

Details Optical paramagnetic/diamagnetic gas sensor Optical paramagnetic/diamagnetic gas sensor

1988-02-10

1989-10-24

Williams, Hezron E.

Measuring and testing

Gas analysis

By vibration

324204, G01R 3312, G01N 2774

Patent

active

048753572

ABSTRACT:
An improved gas sensor which optically senses a signal indication proportional to the concentration of a paramagnetic/diamagnetic gas in a gaseous mixture. In a preferred embodiment of the invention a chamber is adapted to contain a gaseous mixture to be measured for the concentration of a paramagnetic/diamagnetic gas in the mixture. An optical source provides light to a movable element coupled to the chamber. In response to the application of a magnetic field across the chamber, any paramagnetic/diamagnetic gas in the chamber causes the movable element to be displaced by a distance proportional to the concentration of the paramagnetic/diamagnetic gas in the gaseous mixture. A photodetector circuit receives light from the movable element having a characteristic indicative of the distance that the movable element was displaced. In response to such received light, the photodetector provides a signal output proportional to the concentration of the paramagnetic/diamagnetic gas in the gaseous mixture.

REFERENCES:
patent: 3487297 (1969-12-01), Guyton
patent: 3616679 (1969-11-01), Meyer et al.
patent: 3648161 (1972-03-01), Cederstrand et al.
patent: 3742344 (1973-06-01), Hummel
patent: 3815018 (1974-06-01), Gast et al.
patent: 3881152 (1975-04-01), Tasaki
patent: 4403186 (1983-09-01), Kotani et al.
patent: 4563894 (1986-01-01), Karrer
Publication, Introduction to Magnetic Materials, B. D. Cullity, Chapter 2, p. 74-78 (1972).

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