Browse Prior Art Database

Automatic Specific Gravity Monitor for Continuous Real-Time Use

IP.com Disclosure Number: IPCOM000037735D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Light, DN: AUTHOR [+3]

Abstract

This disclosure describes a unique structure for a monitor for continuous use in a corrosive environment when measuring specific gravity. It is based upon the hydrometer principle of operation and its structural features are revealed in the Figure.

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Automatic Specific Gravity Monitor for Continuous Real-Time Use

This disclosure describes a unique structure for a monitor for continuous use in a corrosive environment when measuring specific gravity. It is based upon the hydrometer principle of operation and its structural features are revealed in the Figure.

A solid light-absorbing medium, such as colored glass or plastic, is affixed to the top of a float. The absorbing medium is oriented between a light source and a photo detector. The amount of absorbance is proportional to the height of the float, and therefore, the specific gravity of the process solution is revealed by the height of the float in the solution.

The particular design of the light absorbing medium involves selecting a colored material that absorbs light at the wavelength at which the photo detector is responsive. The material can be a uniform color and vary in thickness over its length, or alternatively, it can be of uniform thickness and vary in color intensity over its length. The color, the thickness and the length are what provide the monitor with its high measurement resolution.

Disclosed anonymously.

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