Patent ID: 7362110
Filing Date: 2008-04-22
Classification: G01N

Abstract:
1. A measurement cell for determining the resistivity and/or permittivity of a liquid, the cell comprising: a first and second set of electrically conductive metal plates with each plate having opposing plate faces, the first set of plates being interleaved in parallel and equally spaced plate facing relationship with the plate faces of the second set of electrically conductive metal plates, the number of plates respectively in the first set and second set, the dimensions of the plates, and the spacing between the alternating plates of the first and second sets being predetermined for the liquid to be placed or flowed between them for determination of the present value of the liquid's resistivity and/or permittivity; a first set of electrical connectors between pairs of plates of the first set, the first set of electrical connectors being electrically insulated with a first insulation layer from interposed plates of the second set of plates; a second set of electrical connectors between pairs of plates of the second set, the second set of electrical connectors being electrically insulated with a second insulation layer from interposed plates of the first set of plates; and a first electrical connection to one plate of the first set of plates and a second electrical connection to one plate of the second set of plates for delivery of variable and high frequency electrical signals to the plates; the insulation of the first and second sets of electrical connectors between facing plates promoting current flow through an intervening liquid perpendicularly to the faces of each pair of facing plates.