Abstract: A device for measuring the temperature of a melt, particularly of a molten metal, includes an optical fiber and a guiding tube having an immersion end and a second end opposite to the immersion end. The optical fiber is partially arranged in the guiding tube. An inner diameter of the guiding tube is larger than an outer diameter of the optical fiber. A first plug is arranged at the immersion end of or within the guiding tube proximate the immersion end of the guiding tube. The optical fiber is fed through the first plug and the first plug reduces a gap between the optical fiber and the guiding tube.

Abstract: A feeding device for feeding an optical fiber from a coil and for recoiling unused fiber for use in an apparatus for measuring the temperature of a melt is provided. The feeding device includes a support for a coil, a feeding mechanism for decoiling the optical fiber from the coil and recoiling the optical fiber, at least one motor for driving the feeding mechanism, and a load for the optical fiber which avoids a spring back effect of the optical fiber from the coil. Blockage is avoided when decoiling and recoiling the optical fiber from the coil.

Abstract: An immersion device for measuring the temperature of a melt with an optical fiber, preferably a metal coated optical fiber, in a metallurgical vessel includes a feeding channel, feeding means for feeding an optical fiber into a disposable guiding tube and for feeding the disposable guiding tube together with the optical fiber into the melt, and control means for monitoring the position of an end of the optical fiber relative to an end of the disposable guiding tube. The relative position determines the quality of a temperature measurement.

Abstract: An immersion device for disposable guiding tubes of a robotic immersion device includes a stack for the disposable guiding tubes, a feeding channel for feeding an optical fiber into the disposable guiding tube and for feeding the disposable guiding tube together with the optical fiber into a melt, and a transfer mechanism for transferring one disposable guiding tube from the stack into the channel.

Abstract: A drop-in probe includes a measurement head having an immersion end and an opposing second end having an end face. The measurement head is formed of first and second body halves configured to mate together along a parting line. A sample chamber, arranged within the measurement head, is thermally isolated from a cooling mass thereof and includes a metal wall having a thickness of 2.5 mm or less. An inlet tube has an inlet opening to the sample chamber. The inlet opening has a diameter Dinlet and is spaced apart from the end face of the measurement head at a distance of at least D inlet 2 . When the sample chamber is filled with a sample of the molten metal, a ratio of a mass of the metal sample to a mass of the metal wall of the sample chamber is greater than 2.6 and less than 6.

Abstract: A device for measuring the temperature of a melt, particularly of a molten metal, comprises an optical fiber and a guiding tube having an immersion end and a second end opposite to the immersion end. The optical fiber is partially arranged in the guiding tube. An inner diameter of the guiding tube is larger than an outer diameter of the optical fiber. A first plug is arranged at the immersion end of or within the guiding tube proximate the immersion end of the guiding tube. The optical fiber is fed through the first plug and the first plug reduces a gap between the optical fiber and the guiding tube.

Abstract: A device for measuring the temperature of a melt, particularly of a molten metal, includes an optical fiber and a guiding tube having an immersion end and a second end opposite to the immersion end. The optical fiber is partially arranged in the guiding tube. An inner diameter of the guiding tube is larger than an outer diameter of the optical fiber. A first plug is arranged at the immersion end of or within the guiding tube proximate the immersion end of the guiding tube. The optical fiber is fed through the first plug and the first plug reduces a gap between the optical fiber and the guiding tube.

Abstract: A method, device and apparatus are provided for measuring the temperature of a melt, particularly of a molten metal, with an optical fiber, fed into the melt through a disposable guiding tube. The optical fiber and an immersion end of the tube are immersed into the melt and have feeding speeds which are independent from each other. An elastic plug is arranged within the tube or at an end of the tube opposite the immersion end. The optical fiber is fed through the elastic plug, and the elastic plug reduces a gap between the optical fiber and the tube, which has a larger inner diameter than the outer diameter of the optical fiber. The apparatus includes a fiber coil and a feeding mechanism for feeding the optical fiber and the tube, including at least two independent feeding motors, one for feeding the optical fiber and one for feeding the tube.

Abstract: An immersion device for disposable guiding tubes of a robotic immersion device includes a stack for the disposable guiding tubes, a feeding channel for feeding an optical fiber into the disposable guiding tube and for feeding the disposable guiding tube together with the optical fiber into a melt, and a transfer mechanism for transferring one disposable guiding tube from the stack into the channel.

Abstract: An immersion device for measuring the temperature of a melt with an optical fiber, preferably a metal coated optical fiber, in a metallurgical vessel includes a feeding channel, feeding means for feeding an optical fiber into a disposable guiding tube and for feeding the disposable guiding tube together with the optical fiber into the melt, and control means for monitoring the position of an end of the optical fiber relative to an end of the disposable guiding tube. The relative position determines the quality of a temperature measurement.

Abstract: A feeding device for feeding an optical fiber from a coil and for recoiling unused fiber for use in an apparatus for measuring the temperature of a melt is provided. The feeding device includes a support for a coil, a feeding mechanism for decoiling the optical fiber from the coil and recoiling the optical fiber, at least one motor for driving the feeding mechanism, and a load for the optical fiber which avoids a spring back effect of the optical fiber from the coil. Blockage is avoided when decoiling and recoiling the optical fiber from the coil.

Abstract: A drop-in probe includes a measurement head having an immersion end and an opposing second end having an end face. The measurement head is formed of first and second body halves configured to mate together along a parting line. A sample chamber, arranged within the measurement head, is thermally isolated from a cooling mass thereof and includes a metal wall having a thickness of 2.5 mm or less. An inlet tube has an inlet opening to the sample chamber. The inlet opening has a diameter Dinlet and is spaced apart from the end face of the measurement head at a distance of at least Dinlet/2. When the sample chamber is filled with a sample of the molten metal, a ratio of a mass of the metal sample to a mass of the metal wall of the sample chamber is greater than 2.6 and less than 6.

Abstract: A device for measuring the temperature of a melt, particularly of a molten metal, comprises an optical fiber and a guiding tube having an immersion end and a second end opposite to the immersion end. The optical fiber is partially arranged in the guiding tube. An inner diameter of the guiding tube is larger than an outer diameter of the optical fiber. A first plug is arranged at the immersion end of or within the guiding tube proximate the immersion end of the guiding tube. The optical fiber is fed through the first plug and the first plug reduces a gap between the optical fiber and the guiding tube.

Abstract: A device is provided for measuring parameters or for taking samples in molten iron or steel and for taking samples of slag resting on the melt. The device includes a carrier tube having an immersion end, a lateral circumferential surface, and a measuring head arranged on the immersion end. At least one sensor or inlet opening for a sample chamber present inside the device is arranged at the immersion end of the measuring head. The lateral circumferential surface of the carrier tube or measuring head has an inlet opening extending through an inlet channel to merge in a pre-chamber arranged inside the carrier tube or measuring head. The pre-chamber has, at its end facing away from the immersion end, an entry opening that merges into a slag sample chamber on the side of the pre-chamber facing away from the immersion end.

Abstract: A sampler is provided for taking samples from melts having a melting point higher than 600° C., in particular for metal or cryolite melts. The sampler includes a carrier tube having an immersion end and having a sample chamber assembly arranged on the immersion end of the carrier tube. The assembly has an inlet opening and a sample cavity for the melt and is arranged at least partly inside the carrier tube. The sample chamber assembly has on a part of its outer surface a coupling device, arranged inside the carrier tube, for coupling a carrier lance. A method is also provided for taking samples using such a sampler.

Abstract: A method, device and apparatus are provided for measuring the temperature of a melt, particularly of a molten metal, with an optical fiber, fed into the melt through a disposable guiding tube. The optical fiber and an immersion end of the tube are immersed into the melt and have feeding speeds which are independent from each other. An elastic plug is arranged within the tube or at an end of the tube opposite the immersion end. The optical fiber is fed through the elastic plug, and the elastic plug reduces a gap between the optical fiber and the tube, which has a larger inner diameter than the outer diameter of the optical fiber. The apparatus includes a fiber coil and a feeding mechanism for feeding the optical fiber and the tube, including at least two independent feeding motors, one for feeding the optical fiber and one for feeding the tube.

Abstract: A measuring probe is provided for measuring and taking samples in a metal melt. The probe has a measuring head arranged on a lance, wherein the measuring head carries at least a temperature sensor and a sampling chamber, and wherein the sampling chamber is surrounded, at least partially, by the measuring head and includes an intake duct that extends through the measuring head. The intake duct includes an inner section, which extends in the measuring head and has a length L and a minimum diameter D at least at one site in the inner section. The ratio L/D2 is less than 0.6 mm?1.

Abstract: A sampler is provided for taking samples from melts having a melting point higher than 600° C., in particular for metal or cryolite melts. The sampler includes a carrier tube having an immersion end and having a sample chamber assembly arranged on the immersion end of the carrier tube. The assembly has an inlet opening and a sample cavity for the melt and is arranged at least partly inside the carrier tube. The sample chamber assembly has on a part of its outer surface a coupling device, arranged inside the carrier tube, for coupling a carrier lance. A method is also provided for taking samples using such a sampler.

Abstract: A measuring probe is provided for measuring and taking samples in a metal melt. The probe has a measuring head arranged on a lance, wherein the measuring head carries at least a temperature sensor and a sampling chamber, and wherein the sampling chamber is surrounded, at least partially, by the measuring head and includes an intake duct that extends through the measuring head. The intake duct includes an inner section, which extends in the measuring head and has a length L and a minimum diameter D at least at one site in the inner section. The ratio L/D2 is less than 0.6 mm?1.

Abstract: An apparatus is provided for the determination of at least one parameter of a molten metal or a slag layer lying on top of the molten metal. The apparatus has a carrier tube, a measuring head arranged on one end of the carrier tube with a body fixed in the carrier tube. An A/D converter is arranged within the measuring head or the carrier tube, and the A/D converter is connected to at least one sensor arranged in or on the measuring head. The measuring head has a contact piece, which is electrically connected via its contact terminals to the signal output of the A/D converter, and the contact piece is connected to a lance inserted into the carrier tube. No more than two signal lines are arranged within the lance, the signal lines each being connected at one end via a contact terminal of the contact piece to the A/D converter and at an opposite end to a computer or an analysis device.