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Sensing system and method for analyzing a fluid at an industrial site

  • US 10,018,613 B2
  • Filed: 09/25/2015
  • Issued: 07/10/2018
  • Est. Priority Date: 11/16/2006
  • Status: Active Grant
First Claim
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1. A system comprising:

  • a sensor comprising a sensing region including at least two electrode structures and at least one resonant inductor-capacitor-resistor (LCR) circuit, each electrode structure including at least two electrodes, the sensing region being configured to be placed in operational contact with a fluid of interest at an industrial site, the at least one resonant LCR circuit being electrically connected to the electrode structures and configured to generate an electrical stimulus having a spectral frequency range, the electrical stimulus being applied to the fluid via the electrode structures; and

    a device body operably coupled to the sensor, the device body including one or more processors configured to receive an electrical signal from the sensor that is representative of a resonant impedance spectral response of the sensing region in operational contact with the fluid responsive to the electrical stimulus being applied to the fluid, the one or more processors configured to analyze the resonant impedance spectral response and determine both a concentration of an external contaminant in the fluid and an aging level of the fluid based on the resonant impedance spectral response that is analyzed;

    wherein the sensor has a probe body that extends between a distal end and a proximal end, the probe body including a shoulder disposed between the distal end and the proximal end, the sensing region of the sensor extending from the shoulder to the distal end of the probe body, the electrode structures of the sensing region being disposed at different distances relative to the shoulder such that the electrode structures extend different depths into the fluid.

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