Abstract: The present invention relates to a method and a system for determining a temperature value of a molten metal bath. The method according to the invention has been proven to be especially suitable for installations of metallurgical vessels which are constantly moved during the metal making process.

Abstract: The present invention relates to a method and a system for determining a temperature value of a molten metal bath. The method according to the invention has been proven to be especially suitable for repeated determinations of temperature values; i.e. the method allows for multiple measurements with repeatedly newly generated leading tips of the optical cored wire.

Abstract: The present invention relates to a method and a system for determining a series of at least two temperature values of a molten metal bath with a device comprising an optical cored wire and a detector. The method according to the invention has been proven to be especially suitable for multiple repeated measurements, wherein the temperature of the molten metal bath changes between the measurements.

Abstract: The present invention relates to a method and a system for determining a series of at least two temperature values of a molten metal bath with a device comprising an optical cored wire and a detector. The method according to the invention has been proven to be especially suitable for multiple repeated measurements, wherein a final end temperature of the molten metal bath shall be reached.

Abstract: The invention relates to an immersion device and a method for detecting a position of an optical cored wire using an immersion device. An immersion device for measuring a temperature of a metal melt inside an electric arc furnace vessel with an optical cored wire comprises a blowing lance for blowing purge gas into an entry point to the vessel and a detecting means for detecting a position of the optical cored wire. The optical cored wire can be moved in a feeding channel and/or in the blowing lance relative to the entry point. The detecting means is configured to detect the presence of the optical cored wire in or close to the blowing lance. This enables short distances between the leading end of the fiber and the melt and, thus, short time intervals between temperature measurement sequences.