Chemetrics, Inc.

Scentczar Corporation

Edgar Watson, Jr

Henry B Castaneda

Gordon A Rampy

G Neil Spokes

Teresa A Neale

Joseph E Roehl

Rame Bull

Mark J Greenfield

Mindy R Bennett

Timothy W Caraher

Amber J Ericsson

The present invention is directed toward a residual life indicator. The residual life indicator comprises a solid, surface active, waterproof support medium having a concentric pattern imprinted thereon. The concentric pattern comprises a center pattern and at least one outer pattern. An indicator dye spot is disposed within the center pattern of the concentric patter. When the indicator dye is exposed to contaminants, the indicator dye spot visually moves toward the outer pattern.

Residual life indicator

An instrument kit includes a photometric instrument and a standardizing ampoule. The standardizing ampoule includes a machine readable code that is recognized by the instrument when the ampoule is inserted to initiate a standardizing routine. An analysis kit includes an optical filter assembly and a sample ampoule to be used with the instrument. The filter assembly also includes a machine readable code that is detected by the instrument when inserted to identify the particular test to be conducted by the instrument. The instrument automatically applies the relationship between detected light and concentration of a substance for the particular test and displays the sample concentration in numeric digital form. The instrument operates automatically, and there are no buttons or other external input devices.

Analytical apparatus with coded elements

Growing community of inventors

Grayslake, IL, United States of America

Edgar Watson, Jr