Patent ID: 7417418
Filing Date: 2008-08-26
Classification: B01L,G01N

Abstract:
1. An electrically operated sensor including a thin film arrangement structured as a multilayer sandwich, the sensor comprising: a first stimulated electrode providing an area disposed in a substantially planar configuration; a first measurement electrode providing an area disposed in approximately parallel proximity to said first stimulated electrode; a second stimulated electrode providing an area disposed in approximately parallel proximity to said first measurement electrode, and on an opposite side of said first measurement electrode from said first stimulated electrode; a first electrically insulating layer disposed between said first stimulated electrode and said first measurement electrode to resist electrical communication there-between; a second electrically insulating layer disposed between said first measurement electrode and said second stimulated electrode to resist electrical communication there-between; and a first channel providing a fluid flow path through said first stimulated electrode, said first insulating layer, said first measurement electrode, said second insulating layer, and said second stimulated electrode, and permitting electrolytic electrical communication between said first stimulated electrode, said first measurement electrode, and said second stimulated electrode to form a first interrogation zone disposed between said first stimulated electrode and said second stimulated electrode; wherein: said first stimulated electrode and said second stimulated electrode reside on layers of said sandwich; and said first channel is structured and arranged to resist fluid flow in a direction parallel to said area of said first measurement electrode.