CARBON DIOXIDE SENSOR

• US 3,647,392 A
• Filed: 01/27/1967
• Issued: 03/07/1972
• Est. Priority Date: 01/27/1967
• Status: Expired due to Term

• Current Assignee: Gerald E. Mcginnis
• Original Assignee: Gerald E. Mcginnis
• Inventors: McGinnis, Gerald E.
• Primary Examiner(s): Wolk, Morris O.
• Assistant Examiner(s): Reese, R. M.
• Application Number:
  US04/612,119
• Time in Patent Office: 1,866 Days
• Field of Search: 23/232,254,255,254E,255E,232E
• US Class Current: 422/88
• CPC Class Codes: G01N 31/00 Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
• CPC Class Codes: G01N 33/0013 by a chemical reaction G01N33/0024 takes precedence
• CPC Class Codes: G01N 33/004 for CO, CO2
• CPC Class Codes: Y10T 436/204998 Inorganic carbon compounds

Abstract

The carbon dioxide in a sample of gas to be tested is reacted with potassium superoxide resulting in a related increase of oxygen. The increase in oxygen over that of the original sample is determined in a differential oxygen gauge which compares the partial pressure of oxygen in the original sample with the partial pressure of oxygen in the modified sample including the increased amount of oxygen from the reaction.

Claims

2. Apparatus according to claim 1 wherein said first means includes:

A. a passageway through which the gas to be tested is passed;

B. a restricted area in said passageway for providing a difference in pressure on either side of said restriction;

C. sample gas input conduit means connected to the higher pressure side of said restriction;

D. gas output conduit means connected to the lower pressure side of said restriction; and

wherein E. said second means and said differential oxygen gauge constitute a gas analysis section located between, and connected to, said gas input and gas output conduit means.

3. Apparatus according to claim 2 wherein:

A. said conduit means comprise capillary tubes.

4. Apparatus according to claim 1 wherein said second means includes:

A. means for reacting the carbon dioxide chemically to provide the related amount of oxygen.

5. Apparatus according to claim 4 wherein:

A. said chemical reaction includes a reaction with a metallic superoxide.

6. Apparatus according to claim 5 wherein:

A. said metallic superoxide is potassium superoxide.

7. Apparatus according to claim 5 which includes:

A. means for removing water vapor from the sample.