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Browse Prior Art Database

Optical Monitor for Detection of Contaminants in Liquids

IP.com Disclosure Number: IPCOM000049567D
Original Publication Date: 1982-Jun-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 27K

Publishing Venue

IBM

Related People

Figliozzi, JJ: AUTHOR [+2]

Abstract

This optical system is designed for determining a degree of buildup of a contaminant in a solvent.

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Optical Monitor for Detection of Contaminants in Liquids

This optical system is designed for determining a degree of buildup of a contaminant in a solvent.

In various manufacturing applications solvents are used to remove contaminants from workpieces. As the solvent is used, a buildup of the contaminant occurs. At some point in time the solvent must be purged of the contaminant or discarded in order to effectively continue the operation.

This optical monitoring system is capable of determining with great precision the degree of buildup of the contaminant in a solvent, for example, the amount of flux composed of a mixture of organic resins, in a solvent, for example, xylene. In using the system a wavelength of light is determined where the solvent has negligible absorptivity, and the contaminant to be detected has maximum absorptivity. In operation, the absorptivity of the solution is monitored through a filter that passes the selected wavelength of light. When the absorptivity of the solution reaches a predetermined level, based upon a correlation of absorptivity versus contamination content, the tolerable level of contamination is exceeded and the solution being monitored must be discarded or refined.

A preferred embodiment of the monitoring system is indicated wherein the tank 10 containing the solvent 12 to be monitored has immersed therein the ends of fiber optic strands 14 arranged so that light passes from one end to the other through the solution. A source...