Fluid quality test method based on impedance

Details Fluid quality test method based on impedance Fluid quality test method based on impedance

2005-07-26

2005-07-26

Le, N. (Department: 2858)

Electricity: measuring and testing

Impedance, admittance or other quantities representative of...

Lumped type parameters

C324S663000

Reexamination Certificate

active

06922064

ABSTRACT:
A system for determining a quality of a fluid includes an impedance cell immersed in the fluid and impedance instrumentation that communicates with the impedance cell. A controller measures a first impedance of the fluid using an electrical signal at a first frequency, measures a second impedance of the fluid using an electrical signal at a second frequency and measures a third impedance of the fluid using an electrical signal at a third frequency. The controller determines a permittivity and a resistivity of the fluid based on the first, second and third impedances. The quality of the fluid is evaluated based on the permittivity and the resistivity.

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