Electrochemical measuring cell for detecting gases and vapors

US5316648A · kind A · utility

Assignee

• DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

• Uwe Kuhn · Riederich, DE
• Herbert Kiesele · Lübeck, DE
• Stephan Haupt · Lübeck, DE

Key dates

• Filing date: Sep 11, 1992
• Grant date: May 31, 1994
• Expiry date: Sep 11, 2012

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N27/4045
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electrochemical measuring cell has a three-electrode system including electrode, counter electrode and reference electrode in an electrolyte. The measuring cell has an additive promoting the electrochemical reaction and is selective and highly sensitive for the detection of hydrogen halides and also provides a stable measuring signal. A measuring cell of this kind has an additive of tetrachloroauric acid in the electrolyte for detecting hydrochloric acid with all electrodes being made of gold. The counter electrode is protected by a cation exchange membrane to provide a further improvement.