Garry L Greer

US Patent:

55386903, Jul 23, 1996

Filed:

Mar 31, 1994

Appl. No.:

8/220909

Inventors:

Garry L. Greer - Hereford AZ
Jack L. Schrader - Hereford AZ
James A. Gideon - Tucson AZ

International Classification:

G01J 148

US Classification:

422 86

Abstract:

An apparatus for indicating the presence of CO and oil in a compressed breathing air supply provided in a tank. An indicator contains a substance which undergoes an observable physical change when exposed to a contaminant. The indicator is activated and placed in a housing and connected to the air supply and the indicator observed. In a preferred embodiment, the indicator is a single use indicator and contains an indicating gel in a glass tube which is opened by breaking at the time of use. Appropriate reference indicia are provided so the user may visually determine the contaminant level.