Method for on-line monitoring of lubricating oil using light...

Details Method for on-line monitoring of lubricating oil using light... Method for on-line monitoring of lubricating oil using light...

2007-02-06

2007-02-06

Soderquist, Arlen (Department: 1743)

Chemistry: analytical and immunological testing

Lubricant, grease, mineral oil, hydrocarbon oil product, or...

C250S343000, C356S070000, C356S246000, C422S081000, C422S082050, C422S082090, C436S052000, C436S061000, C436S139000, C436S140000, C436S141000, C436S142000, C436S165000

Reexamination Certificate

active

10379076

ABSTRACT:
Oil aging and particulate building in a lubricant other than one exposed to combustion products is monitored by detecting light transmitted through the lubricant at least one, and preferably, two or more preselected wavelengths over a pathlength greater than about 0.5 cm wherein one wavelength is in the near infra-red spectrum and/or one wavelength is in the visible or near infra-red spectrum. The detected light when compared to predetermined values provides an indication of the condition of the lubricant.

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