Solid electrolyte sensor for monitoring the concentration of an element in a fluid particularly molten metal
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United States of America Patent
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Feb 26, 2008
Grant Date -
May 6, 2004
app pub date -
Mar 25, 2002
filing date -
Mar 28, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to an electrochemical sensor for determining the concentration of a group IA metal in a fluid such as molten metal. The sensor comprises a substantially pure quantity of the group 1A metal as a reference electrode (13) contained in a sensor housing (3), and a solid electrolyte constituting at least part of the sensor housing (3). The electrolyte is in electrical contact with the reference electrode (13) and the sensor is capable of operating at temperatures in excess of 973K. In a preferred arrangement, the sensor comprises a two part elongate conductor (15), a first part (17) of which extends from the reference electrode (13) into a refractory seal (11a), and a second part (19) of which extends from within the refractory seal (11a) externally of the sensor, the two parts (17, 19) being welded together.
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