Method and apparatus for non-destructively determining ingredien

Details Method and apparatus for non-destructively determining ingredien Method and apparatus for non-destructively determining ingredien

1982-05-06

1985-01-29

Tokar, Michael J.

Electricity: measuring and testing

Electrolyte properties

Using a conductivity determining device

324226, 324228, 324442, G01N 2702

Patent

active

044969074

ABSTRACT:
A test apparatus is provided for measuring the proportion of at least one constituent in a sample of material, which constituent bears a known relationship to the electrical conductivity of the sample. The test apparatus comprises a sensor including both a receptacle for receiving a sample of material and a field producing coil for producing an electromagnetic field within the receptacle. The coil is also designed confining said electromagnetic field to a predetermined, fixed volume within the receptacle and for producing a substantially constant magnitude electromagnetic field throughout this predetermined, fixed volume. A monitoring circuit is coupled with the sensor and is responsive thereto for producing an output signal which bears a predetermined relationship with the real impedance of the sensor and therefore with the conductivity of the sample.

REFERENCES:
patent: 1793970 (1931-02-01), Simon et al.
patent: 2948847 (1960-08-01), Bravenec et al.
patent: 3735247 (1973-05-01), Harker

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