Abstract: Aspects of this disclosure relate to a sheath closure for a dual-wall mineral insulated thermocouple cable. The new closure and methods are required to maintain the integrity of both the inner and outer sheaths or inner and outer walls of a dual-walled thermocouple design. As the inner and outer sheaths are different materials, they may require closure separately with no mixing of the sheathing materials during welding.

Abstract: A gas blocking cable includes cabled wires, where each wire includes cabled conductors having interstitial areas there between. An insulation material circumferentially surrounds the cabled conductors and a conductor filling material is positioned within the interstitial areas between conductors. A shield circumferentially surrounds the cabled wires so that a cable is formed with areas between the wires. A wire filling material is positioned within the areas between the wires. Each of the conductor filling material and wire filling material is inert, non-flammable and able to withstand a temperature of at least approximately 200° C.

Abstract: Aspects of this disclosure relate to a methodology and process of hot junction formation and sheath closure for a dual-wall mineral insulated thermocouple cable. The new methods are required to maintain the integrity of both the inner and outer sheaths or inner and outer walls of a dual-walled thermocouple design. As the inner and outer sheaths are different materials, they may require closure separately with no mixing of the sheathing materials during welding.

Abstract: A thermocouple ribbon features a pair of flat conductors and first and second layers of a polyimide film covering the conductors. The polyimide film preferably is coated with a fluoropolymer, such as fluorinated ethylene propylene (FEP). During manufacture of the thermocouple ribbon, the first and second layers of polyimide film, with the pair of flat conductors positioned there between, are heated above the melting temperature of the FEP. The completed thermocouple ribbon is then cooled. A thermocouple connector may then be attached to a first end of the thermocouple ribbon, while a welded thermocouple junction may be formed at a second end of the thermocouple ribbon.

Abstract: A gas blocking cable includes cabled wires, where each wire includes cabled conductors having interstitial areas there between. An insulation material circumferentially surrounds the cabled conductors and a conductor filling material is positioned within the interstitial areas between conductors. A first shield circumferentially surrounds the twisted wires and a high-temperature filler, thereby separating a drain wire. A second shield circumferentially surrounds the cabled wires and the drain wire so that a cable is formed with areas between the first shield and the second shield. A wire filling material is positioned within the areas between the wires and the shields. Each of the conductor filling material and wire filling material is inert, non-flammable and able to withstand a temperature of at least approximately 200° C.

Abstract: A thermocouple ribbon features a pair of flat conductors and first and second layers of a polyimide film covering the conductors. The polyimide film preferably is coated with a fluoropolymer, such as fluorinated ethylene propylene (FEP). During manufacture of the thermocouple ribbon, the first and second layers of polyimide film, with the pair of flat conductors positioned there between, are heated above the melting temperature of the FEP. The completed thermocouple ribbon is then cooled. A thermocouple connector may then be attached to a first end of the thermocouple ribbon, while a welded thermocouple junction may be formed at a second end of the thermocouple ribbon.

Abstract: In a thermocouple, a pair of thermoelements extend within a protective sheath. The thermoelements are spaced from the sheath by an insulator. The sheath comprises an outer sheath formed from a metal alloy adapted to provide mechanical support and corrosion resistance during use of the thermocouple, typically at elevated temperature. The sheath further comprises an inner sheath positioned between the outer sheath and the thermoelements and formed from a nickel-based alloy containing less than 10 wt % Cr, to prevent diffusion of Cr and/or Mn from the outer sheath to the thermoelements.

Abstract: A gas blocking cable includes cabled wires, where each wire includes cabled conductors having interstitial areas there between. An insulation material circumferentially surrounds the cabled conductors and a conductor filling material is positioned within the interstitial areas between conductors. A shield circumferentially surrounds the cabled wires so that a cable is formed with areas between the wires. A wire filling material is positioned within the areas between the wires. Each of the conductor filling material and wire filling material is inert, non-flammable and able to withstand a temperature of at least approximately 200° C.

Abstract: A thermocouple ribbon features a pair of flat conductors and first and second layers of a polymide film covering the conductors. The polyimide film preferably is coated with a fluoropolymer, such as fluorinated ethylene propylene (FEP). During manufacture of the thermocouple ribbon, the first and second layers of polyimide film, with the pair of flat conductors positioned there between, are heated above the melting temperature of the FEP. The completed thermocouple ribbon is then cooled. A thermocouple connector may then be attached to a first end of the thermocouple ribbon, while a welded thermocouple junction may be formed at a second end of the thermocouple ribbon.