Oil quality sensor structure for permanent applications

Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Lubricant testing

Reexamination Certificate

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C073S054010

Reexamination Certificate

active

11244594

ABSTRACT:
An oil quality sensor system comprise an acoustic wave viscosity and an etch rate sensor. The etch rate sensor system includes a piezoelectric substrate and one or more sensing layers configured upon the piezoelectric substrate. A layer of gold is generally configured above the sensing layer(s), such that the gold layer provides protection to the sensing layer(s), thereby extending the operating life of the resulting etch rate sensor system. The sensing layer(s) generally comprises one or more reactive electrodes. The etch rate sensor system can be adapted for use in a permanent oil quality sensor application.

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