METHOD AND APPARATUS FOR CARRYING OUT A MEASURING OR SAMPLING OPERATION IN A MOLTEN METAL BATH

摘要

The buoyancy change of a probe as it is lowered into a molten metal melt is detected and the lowering of the probe terminated a predetermined time after the detection of the buoyancy change to precisely position the probe at a predetermined level below the surface of the melt without the need for a contact detector which actually touches the melt.