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Oil sensor systems and methods of qualitatively determining oil type and condition

  • US 5,274,335 A
  • Filed: 04/06/1992
  • Issued: 12/28/1993
  • Est. Priority Date: 04/06/1992
  • Status: Expired due to Fees
First Claim
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1. A method of determining the quality of an oil comprising:

  • placing two spaced apart electrodes in an oil to be tested;

    applying an alternating current triangular waveform potential to the electrodes;

    measuring the electrochemical current, being the induced current minus the capacitance component current, between electrodes; and

    comparing the measured electrochemical current with predetermined values corresponding to two-stroke oil, four-stroke oil and oil including antifreeze.

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