×

Fluid quality test method based on impedance

  • US 20040257094A1
  • Filed: 06/18/2003
  • Published: 12/23/2004
  • Est. Priority Date: 06/18/2003
  • Status: Active Grant
First Claim
Patent Images

1. A system for determining a quality of a fluid, comprising:

  • an impedance cell immersed in said fluid;

    impedance instrumentation that communicates with said impedance cell; and

    a controller that measures a first impedance of said fluid using an electrical signal at a first frequency, measures a second impedance of said fluid using an electrical signal at a second frequency, measures a third impedance of said fluid using an electrical signal at a third frequency, determines a permittivity and a resistivity of said fluid based on said first, second and third impedances and evaluates said quality of said fluid based on said permittivity and said resistivity.

View all claims
  • 13 Assignments
Timeline View
Assignment View
    ×
    ×