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:
Feb. 13, 2007
Filed:
Jan. 22, 2003
Herbert Kiesele, Lübeck, DE;
Peter Tschuncky, Lübeck, DE;
Herbert Kiesele, Lübeck, DE;
Peter Tschuncky, Lübeck, DE;
Abstract
A process and a device are provided for monitoring the hydrogen concentration in a gas with at least one device, which comprises an electrochemical gas sensor and a bipotentiostat, e.g., for use in internal combustion engines with hydrogen, in fuel cells and in the petrochemical industry. The electrochemical gas sensor used has two working electrodes () and (), with which the hydrogen and oxygen concentrations are determined in the gas in different steps due to the application of a voltage by a bipotentiostat (-). In an additional, optional step, a voltage in the range of −1,100 mV to −800 mV is applied to a working electrode (), so that hydrogen is formed at the working electrode () and the functional surface of the working electrode () as well as the sensitivity of the working electrode () to hydrogen can be checked. A cyclic repetition of the process steps, preferably offset in time, with two devices makes possible the continuous monitoring of the hydrogen and oxygen concentrations with regular checking of the working electrodes () for their readiness to function.