Verfahren und Tauchmeßfühler zum Messen einer elektrochemischen Aktivität

摘要

The invention relates to a method and an immersion sensor to measure electrochemical activity of a layer lying on a molten mass using an electrochemical sensor comprising a measuring cell and a counter electrode. In order to reliably reproduce exact measurements in the layer, the measuring cell and the counter electrode are initially immersed in the molten mass, wherein the measuring cell and the counter electrode are protected before they come into contact with said layer. The measuring cell and the counter electrode are then brought into contact with the molten mass and heated. Subsequently, the measuring cell is pulled up into the layer to carry out measurement, while the counter electrode remains in the molten mass during measurement. To this end, the measuring cell and the counter electrode are provided with a protective cap. The measuring cell is placed above the counter electrode when the sensor is immersed.