Abstract: A Ruhrstahl-Heraeus (RH) apparatus for performing a vacuum degassing process of molten metal includes a sensor hole formed at a lower vessel of a vacuum vessel; a continuous temperature measuring device mounted on the sensor hole and including a light-to-temperature converter measuring temperature based on received light, a light guide rod receiving light from a measurement target, an optical fiber transferring the light received by the light guide rod to the light-to-temperature converter, a connector connecting the optical fiber to the light guide rod while maintaining straightness of the optical fiber, a primary protection tube enclosing an outer peripheral surface of the light guide rod, a flexible heat resistant tube protecting the optical fiber, and a joint connected to the flexible heat resistant tube and provided with a cooling gas injection tube; and a cooling gas supply unit supplying cooling gas to the cooling gas injection tube.

Abstract: Disclosed are a holder replacing member and a holder assembly including the same. The holder replacing member includes: a pipe-shaped conductive case; a first insulating body disposed on an inner surface of a leading end of the conductive case; a first contact pin and a second contact pin located in a hollow portion of the conductive case to be electrically connected to probes, respectively; a second insulating body electrically isolating the first contact pin, the second contact pin, and the conductive case from one another; and a female screw member coupled to an outer peripheral surface of a rear end of the conductive case to be rotated independently of the conductive case and having a female screw on an inner peripheral surface thereof.

Abstract: Disclosed are a holder replacing member and a holder assembly including the same. The holder replacing member includes: a pipe-shaped conductive case; a first insulating body disposed on an inner surface of a leading end of the conductive case; a first contact pin and a second contact pin located in a hollow portion of the conductive case to be electrically connected to probes, respectively; a second insulating body electrically isolating the first contact pin, the second contact pin, and the conductive case from one another; and a female screw member coupled to an outer peripheral surface of a rear end of the conductive case to be rotated independently of the conductive case and having a female screw on an inner peripheral surface thereof.