A sheathed thermocouple includes thermocouple wires; a metal sheath accommodating the thermocouple wires; inorganic insulating material powder filled in an internal space of the metal sheath; a glass seal part tightly sealing an opening of the metal sheath while allowing the thermocouple wires to pass; compensation lead wires connected to the thermocouple wires; a metal sleeve having a cylindrical shape having a leading end part defining a connecting section connected with an outer peripheral surface of the metal sheath, and allowing a portion of the metal sheath closer to a proximal end than the connecting section, the thermocouple wires and the compensation lead wires to be in an internal space, the thermocouple wires and the compensation lead wires lying without contact between themselves; and a glass filler part made of a glass having a lower softening temperature than the glass seal part, and filling an internal space of the metal sleeve.

A low thermal conductivity fixed thermocouple with a heat sink package specifically designed for electrically heated vacuum furnaces having an overall cylindrical hot zone diameter of 36 inches or less, and preferably containing all metal reflective radiation shields or graphite felt insulation packages that experience high conductive losses in the low temperature ranges during vacuum heating which result in large discrepancies between the furnace temperature readings and the actual workload temperature.

A low thermal conductivity fixed thermocouple with a heat sink package specifically designed for electrically heated vacuum furnaces having an overall cylindrical hot zone diameter of 36 inches or less, and preferably containing all metal reflective radiation shields or graphite felt insulation packages that experience high conductive losses in the low temperature ranges during vacuum heating which result in large discrepancies between the furnace temperature readings and the actual workload temperature.

A system includes a metal tub structure formed in an integrated circuit (IC) structure, a first metal component, and a second metal component. The first metal component is formed from a first metal. The first metal component is formed in an opening defined by the metal tub structure, and includes a first metal first junction element, a first metal second junction element, and a first metal bridge electrically connected to the first metal first junction element and the first metal second junction element. The second metal component is formed from a second metal different than the first metal, and includes a second metal first junction element electrically connected to the first metal first junction element to define a first thermocouple junction, and a second metal second junction element electrically connected to the first metal second junction element to define a second thermocouple junction.

A system includes a metal tub structure formed in an integrated circuit (IC) structure, a first metal component, and a second metal component. The first metal component is formed from a first metal. The first metal component is formed in an opening defined by the metal tub structure, and includes a first metal first junction element, a first metal second junction element, and a first metal bridge electrically connected to the first metal first junction element and the first metal second junction element. The second metal component is formed from a second metal different than the first metal, and includes a second metal first junction element electrically connected to the first metal first junction element to define a first thermocouple junction, and a second metal second junction element electrically connected to the first metal second junction element to define a second thermocouple junction.

A sheathed thermocouple includes thermocouple wires; a metal sheath accommodating the thermocouple wires; inorganic insulating material powder filled in an internal space of the metal sheath; a glass seal part tightly sealing an opening of the metal sheath while allowing the thermocouple wires to pass; compensation lead wires connected to the thermocouple wires; a metal sleeve having a cylindrical shape having a leading end part defining a connecting section connected with an outer peripheral surface of the metal sheath, and allowing a portion of the metal sheath closer to a proximal end than the connecting section, the thermocouple wires and the compensation lead wires to be in an internal space, the thermocouple wires and the compensation lead wires lying without contact between themselves; and a glass filler part made of a glass having a lower softening temperature than the glass seal part, and filling an internal space of the metal sleeve.

A sheathed thermocouple includes thermocouple wires; a metal sheath accommodating the thermocouple wires; inorganic insulating material powder filled in an internal space of the metal sheath; a glass seal part tightly sealing an opening of the metal sheath while allowing the thermocouple wires to pass; compensation lead wires connected to the thermocouple wires; a metal sleeve having a cylindrical shape having a leading end part defining a connecting section connected with an outer peripheral surface of the metal sheath, and allowing a portion of the metal sheath closer to a proximal end than the connecting section, the thermocouple wires and the compensation lead wires to be in an internal space, the thermocouple wires and the compensation lead wires lying without contact between themselves; and a glass filler part made of a glass having a lower softening temperature than the glass seal part, and filling an internal space of the metal sleeve.

A thermocouple is provided that can measure a temperature of a material in a high temperature range of 1500° C. or higher with high accuracy at low cost. The thermocouple includes a first conductive member and a second conductive member. The first conductive member and the second conductive member are connected to each other to form a temperature sensing junction. The first conductive member contains a first conductive ceramic containing zirconium diboride and/or titanium diboride silicon carbide, a sintering agent, and unavoidable impurities. In the first conductive ceramic, the content of the silicon carbide is 5 mass % or more and 40 mass % or less. The second conductive member contains a second conductive ceramic containing boron carbide as a main constituent material.

In one aspect, a temperature sensing assembly for measuring temperature of a surface of a structure includes a thermocouple device and a docking device. The thermocouple device includes a temperature sensing junction point disposed within an elongate sheath to measure the temperature of the surface of the structure at a desired location. The thermocouple device further comprises a contact portion configured to contact the surface of the structure. The docking device has a bottom surface to attach to the surface of the structure adjacent the desired location. A line extends through the center of the sheath and the sheath has a cross-sectional area in a plane perpendicular to the line. The contact portion is configured such that, when the docking device is coupled to the surface, an area of contact between the contact portion and the surface of the structure is greater than the cross-sectional area of the sheath.

In one aspect, a temperature sensing assembly for measuring temperature of a surface of a structure includes a thermocouple device and a docking device. The thermocouple device includes a temperature sensing junction point disposed within an elongate sheath to measure the temperature of the surface of the structure at a desired location. The thermocouple device further comprises a contact portion configured to contact the surface of the structure. The docking device has a bottom surface to attach to the surface of the structure adjacent the desired location. A line extends through the center of the sheath and the sheath has a cross-sectional area in a plane perpendicular to the line. The contact portion is configured such that, when the docking device is coupled to the surface, an area of contact between the contact portion and the surface of the structure is greater than the cross-sectional area of the sheath.