The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 01, 1988
Filed:
Dec. 17, 1985
Syunzo Mase, Tobishima, JP;
Shigeo Soejima, Nagoya, JP;
NGK Insulators, Ltd., , JP;
Abstract
An electrochemical device of a laminar structure for determining the concentration of a component in a measurement gas, comprising: a pumping cell including a first and a second electrode disposed on a first planar solid electrolyte body; a sensing cell including a third and a fourth electrode disposed on a second planar solid electrolyte body; and a thin flat space to which the first and third electrodes are exposed and which communicates with an external space in which the measurement gas exists. The thin flat space has a diffusion resistance to the component in the measurement gas introduced through an inlet thereof. The first and third electrodes and the thin flat space are positioned and dimensioned relative to each other so that a distance 'l' is smaller than a distance 'm', as measured in a cross section perpendicular to planes of the solid electrolyte bodies, where the distance 'l' is measured between the inlet of the thin flat space and a point of the first electrode nearest to the inlet as measured in the above-indicated cross section, and the distance 'm' is measured between the inlet and a point of the third electrode nearest to the inlet as measured in the above-indicated cross section.