Patent · US Expired

Electrochemical measuring cell for detecting hydride gases

US6251244A · kind A · utility

3Cited by

4References

19Claims

0Family size

Assignee

Drager Sicherheitstechnik GmbH · DE

Inventors

Herbert Kiesele · Lübeck, DE
Frank Mett · Lübeck, DE

Key dates

Filing date	Jul 13, 1999
Grant date	Jun 26, 2001
Priority date	—
Expiry date	Jul 13, 2019

Classification

Technology area (CPC G)Physics
CPC primaryG01N27/4045
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention is directed to an electrochemical measuring cell for detecting hydride gases, preferably arsine and phosphine. The measuring cell includes at least one working electrode (3) made of a catalytically inactive material and a reference electrode (4) in an electrolyte chamber (6) filled with an electrolyte containing sulphuric acid. The measuring cell is improved as to the cross sensitivity with respect to other toxic gases. The working electrode is configured as a carbon electrode (3) and an electrolyte additive of silver sulphate is provided in saturated solution in the electrode (9).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.