Patent ID: 11867161
Assignee: SPM OIL & GAS INC.
Field: Measurement (Instruments)
Classification: CPC F  G | IPC F  G

Claim 14:
15. A method of determining a quality of oil in a reservoir of a pump, the method comprising:
providing a sensor including:
a first capacitive portion for measuring a level of the oil based on a degree of exposure of the sensor to the oil; and
a second capacitive portion for measuring a dielectric constant of the oil,
wherein the first and second capacitive portions each include a first capacitive element and share a common second capacitive element spaced from the respective first capacitive elements,
wherein the second capacitive element is tubular, and
wherein each first capacitive element is arranged concentrically within the second capacitive element;

exposing the sensor to a substantially constant oil level; and
determining the quality of the oil based on the sensed dielectric constant of the oil.