Monitoring of fluid contamination level wherein the light energy

Details Monitoring of fluid contamination level wherein the light energy Monitoring of fluid contamination level wherein the light energy

1993-08-09

1995-08-01

Rosenberger, Richard A.

Optics: measuring and testing

For light transmission or absorption

Of fluent material

356442, G01N 2100

Patent

active

054384206

ABSTRACT:
Apparatus for monitoring fluid contaminant level that includes a light source positioned on one side of a fluid sample path for directing light energy into fluid flowing in the sample path, a photosensor positioned on the same side of the sample path, and a reflector positioned on an opposing side of the sample path for receiving light from the source transmitted through the sample fluid and reflecting such light back through the fluid to the photosensor. The photosensor provides an electrical signal as a function of intensity of light incident thereon from the light source after having twice passed through the fluid, and the concentration or level of contaminants in the fluid is indicated as a function of such electrical signal. Thus, the concentration of contaminants that extinguish light energy transmitted through the fluid is indicated as an inverse function of light intensity at the photosensor, and may be compared to a preset target threshold level for indicating an undesirably high contamination level.

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Vickers, Incorporated, "Vickers Guide to Systematic Contamination Control", 1992.

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