Heraeus Electro-nite International N.v.

Jaques Josef Plessers

Marc Straetemans

A device for conducting electrochemical measurements in glass or salt melts has at least one indicator electrode and one reference electrode arrangement. In order to be able to conduct very exact measurements, the tip of the indicator electrode intended to be immersed in the melt is constructed of a noble metal or noble metal alloy with at least one another noble metal, preferably iridium or an iridium alloy with other noble metals, and is mounted gas-tight in a heat-resistant tube. The indicator electrode is passed through the heat-resistant tube.

Device for conducting electrochemical measurements in glass or salt melts

A process is provided for determining the concentration of a gas in a molten metal by a carrier gas, which can be pumped to at least one analyzer, either in direct route for calibration, or for measuring through a measuring circuit with a measuring probe immersed in the molten metal, wherein the carrier gas effects a gas exchange with the molten metal, and this gas mixture is pumped to the analyzer for measurement. In order to obtain an accurate and quick reading of the concentration of a gas in a molten metal, the carrier gas is pumped for one segment of a measuring cycle directly to the analyzer for calibration, as well as to the measuring circuit for purging and for uptake of the gas to be measured, so that the gas to be measured is ready for the analyzer. Hence, the carrier gas is pumped through the measuring circuit to at least one analyzer, and a partial pressure is calculated after the gas exchange in the molten metal, as a first approximate value for the partial pressure of the gas to be measured from the molten metal.

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Houthalen, Belgium

Jaques Josef Plessers