Method and apparatus for monitoring detergent concentration...

Electricity: measuring and testing – Impedance – admittance or other quantities representative of... – Lumped type parameters

Reexamination Certificate

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Reexamination Certificate

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06930493

ABSTRACT:
A method and apparatus for monitoring the concentration of a detergent in a detergent solution. A capacitive sensor is exposed to the detergent solution, and electrical properties of the capacitive sensor are responsive to changes in the concentration of detergent in the detergent solution.

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