The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 1984
Filed:
Jan. 25, 1983
Oriental Yeast Co. Ltd., Tokyo, JP;
Abstract
A carbon dioxide sensor for measuring dissolved carbon dioxide or carbon dioxide in gas is sterilizable with steam under pressure at a temperature of 120-130 degrees Celsius. The sensor comprises an outer tube having on its one end a gas-permeable membrane and a pH electrode disposed in the outer tube and supporting a spacer of poor hydrophobicity positioned between the distal end of the electrode and the membrane. For measurement of carbon dioxide, a liquid containing sodium bicarbonate is poured into the outer tube to form a layer of electrolyte at the spacer, and the outer tube is mounted on a fermentor. The pH electrode can be removed from the outer tube which is attached to the fermentor, and a membrane protecting rod can be inserted into the outer tube for sterilization of the membrane. The gas-permeable membrane can easily be replaced.