Patent ID: 7998399

Claim:
An apparatus for determination of at least one parameter of a molten metal or a slag layer lying on top of the molten metal, comprising: a carrier tube, a measuring head arranged on one end of the carrier tube and having a body affixed in the carrier tube, a contact piece which is electrically connected via its contact terminals to a signal output of the A/D converter, the contact piece providing for a lance to be inserted into the carrier tube, and an A/D converter arranged within the measuring head or the carrier tube, the A/D converter being connected to at least one sensor arranged on or in the measuring head, wherein within the lance a first A/D signal carrying line is conductively connected at one end to an output of the A/D converter via a contact terminal of the contact piece and at an opposite end is conductively connectable to a computer or an analysis device, and wherein a second conductive A/D signal carrying line is formed between the output of the A/D converter and the computer or the analysis device by one of the molten metal, the slag layer and a metal sleeve of the lance via the contact piece.