Measurement of the depletion of basic additives in lubricating oil
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United States of America Patent
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May 3, 1988
Grant Date -
N/A
app pub date -
Apr 16, 1987
filing date -
Apr 16, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Disclosed is a method of measuring the depletion of basic additives in a lubricating oil. A sensor is immersed into the oil, an electric current is passed through the sensor, and the resistance of the sensor is measured. The sensor is made of copper, lead, mixtures of copper and lead, copper alloys, lead alloys, or mixtures thereof. Also disclosed is apparatus for indicating when the basic additives in a lubricating oil have been depleted. The apparatus consists of a sensor which is immersed in the oil, a first pair of electrodes for passing an electric current through the sensor, a second pair of electrodes for measuring the electrical resistance of the sensor, and an indicator for indicating when the electrical resistance has increased to a predetermined amount.
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