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Method and System for Detecting Age, Hydration, and Functional States of Sensors Using Electrochemical Impedance Spectroscopy

  • US 20070170073A1
  • Filed: 12/29/2006
  • Published: 07/26/2007
  • Est. Priority Date: 12/30/2005
  • Status: Active Grant
First Claim
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1. A method of detecting whether a sensor is aged beyond a specified sensor life, comprising:

  • performing an EIS procedure between at least two electrodes of the sensor;

    calculating an impedance value between the electrodes; and

    comparing the impedance value against a threshold to determine if the sensor has aged beyond the specified sensor life.

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