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Method and apparatus for non-destructively determining ingredients of a sample

  • US 4,496,907 A
  • Filed: 05/06/1982
  • Issued: 01/29/1985
  • Est. Priority Date: 05/06/1982
  • Status: Expired due to Term
First Claim
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1. A test apparatus for measuring the amount of at least one constituent present in a sample of material, wherein said at least one constituent bears a known relationship to the electrical conductivity of the sample, comprising:

  • a sensor including receptacle means for receiving a sample of material therein and defining an axis, and field producing means;

    said field producing means including means for producing an electromagnetic field within said receptacle means, means for substantially confining said electromagnetic field to a predetermined, fixed volume within said receptacle means and substantially coaxially therewith, and means for maintaining said confined electromagnetic field substantially uniform and continuous throughout said predetermined, fixed volume to which it is confined;

    said predetermined, fixed volume being located such that the material of said sample extends over the entire axial length thereof when said sample is introduced into the test apparatus.

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