Accession Number : ADD013621

Title :   Optical Paramagnetic/Diamagnetic Gas Sensor.

Descriptive Note : Patent Application, Filed 20 Feb 88,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Giallorenzi, Thomas G

Report Date : 20 Feb 1988

Pagination or Media Count : 37

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.

Descriptors :   *PATENT APPLICATIONS, *MAGNETIC DETECTION, CIRCUITS, DIAMAGNETISM, GAS DETECTORS, GASES, MAGNETIC FIELDS, MIXTURES, OUTPUT, PARAMAGNETISM, PHOTODETECTORS, SIGNALS

Subject Categories : Test Facilities, Equipment and Methods
      Magnetic & Electric Fld Detection & Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE