Measuring electrical impedance of low conductivity samples

Details Measuring electrical impedance of low conductivity samples Measuring electrical impedance of low conductivity samples

G - Physics

01

N

324/45

G01N 27/02 (2006.01) G01N 33/487 (2006.01)

Patent

CA 1322387

ABSTRACT Apparatus for measuring the electrical impedance of low conductivity samples, and particularly microbial suspensions, has a coil surrounding a tubular sample container. A capacitive pick-up on the sample wall provides an input to a variable gain amplifier driving the coil. The resident frequency of the circuit is measured to provide an indication of sample conductivity.

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