Patent ID: 6426212
Filing Date: 2002-07-30
Classification: C12M,G01N

Abstract:
A biological conductivity testing cell, intended for holding a biological sample through which a weak alternating current is passed and the impedance of that current monitored, said biological conductivity testing cell comprising:a glass cylinder possessing two opposed ends each having an electrode disposed thereupon; said glass cylinder possessing an exterior surface, an interior surface, and two opposed substantially parallel end surfaces; a portion of each of two combined surfaces, each including said end surface and the interior and exterior surfaces adjacent to each said end surface, possessing a virgin deposition surface of substantially uniform roughness resulting from glass surface material removed by abrasion; said electrodes each comprising a coating of platinum alloy deposited upon each said combined surface having glass surface material removed therefrom by abrasion; wherein the substantially uniform roughness of said deposition surface provides physical resistance against shear in displacement of each said electrode from said glass cylinder.