×

Fluid quality test method based on impedance

  • US 6,922,064 B2
  • Filed: 06/18/2003
  • Issued: 07/26/2005
  • Est. Priority Date: 06/18/2003
  • Status: Expired due to Fees
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 independent of said impedance cell and 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
    ×
    ×