Patent Number: 6,297,733

Title: Stable, reliable capacitive oil deterioration and level sensor

Abstract: A reliable capacitive oil deterioration and level sensor has a conductive housing member that includes a conductive shielding member defining a ground electrode, and a conductive inner member defining a measuring electrode. The shielding member protects the sensor from moving objects that could adversely affect its performance. The housing member is adapted to provide a fluidic connection between an oil container and a space between the ground electrode and the measuring electrode. The sensor also includes electronics adapted to employ this capacitor geometry to generate signals indicative of a degree of deterioration and a level of the oil within the gap. The electronics further include at least one isolating capacitor to eliminate a flow of current between the electrodes that may cause a build up of material on the two electrodes that define the capacitor. This build up of unwanted material may cause an undesirable effect in the sensor output signal.

Inventors: Park; Kyong M. (Westlake Village, CA)

Assignee: Kavlico Corporation

International Classification: G01N 27/22 (20060101); G01N 33/28 (20060101); G01N 33/26 (20060101); B60Q 001/00 ()

Expiration Date: 10/02/2018