A temperature sensing assembly includes first and second temperature sensors disposed within an elongate mineral insulated conductive sheath. A junction point of the first temperature sensor is electrically connected to the conductive sheath. The second temperature sensor is electrically isolated from the conductive sheath. Measurements obtained from the electrically isolated temperature sensor can be used to test insulation resistance of the assembly or temperature indications from the electrically isolated temperature sensor can be compared to measurements taken from the electrically connected junction point to take a variety of corrective actions during use of the temperature sensing assembly, such as adjusting the installation of the assembly or applying correction factors to measurements obtained from one of the temperature sensors.

An assembly includes an electrical conductor disposed within an elongate mineral insulated conductive sheath. The electrical conductor is electrically grounded to the conductive sheath. The assembly also includes a test conductor disposed within and electrically isolated from the sheath to provide an indication of the insulation resistance of the assembly.

A temperature sensor, having a first conductor made of a first material comprising an end section, a second conductor made of a second material, which differs from the first material, comprising an end section, and a casing for receiving the end sections of the two conductors and for positioning in a process atmosphere or in a process fluid and/or on a surface of a process structure. According to the invention, a measuring point body structure is provided, which is arranged within the casing or on the casing, wherein the first conductor and the second conductor directly or indirectly form a thermocouple in or on the measuring point body structure and the measuring point body structure comprises a barrier material.

A temperature sensor, having a first conductor made of a first material comprising an end section, a second conductor made of a second material, which differs from the first material, comprising an end section, and a casing for receiving the end sections of the two conductors and for positioning in a process atmosphere or in a process fluid and/or on a surface of a process structure. According to the invention, a measuring point body structure is provided, which is arranged within the casing or on the casing, wherein the first conductor and the second conductor directly or indirectly form a thermocouple in or on the measuring point body structure and the measuring point body structure comprises a barrier material.

A multi-core thermocouple includes a plurality of wires, an insulation core surrounding the plurality of wires, a sheath surrounding the insulation core, and a plurality of electrical junctions. The plurality of electrical junctions may include a first electrical junction formed between a first wire of the plurality of wires and the sheath at a first axial mid-section of the multi-core thermocouple, the first electrical junction including a first swaged axial mid-section of the sheath and a second electrical junction formed between a second wire of the plurality of wires and the sheath at a second, different axial mid-section of the multi-core thermocouple, the second electrical junction including a second swaged axial mid-section of the sheath.

A temperature probe includes a sheath, a temperature sensitive element, and an insert. The sheath has a sidewall defining an interior space therein. The temperature sensitive element is disposed within the interior space of the sidewall and has an electrical characteristic that varies with temperature. The insert, which is formed of silicon carbide, is operably interposed between the sidewall and the temperature-sensitive element. A method of manufacturing a temperature probe is also provided. A temperature sensing system employing a temperature probe is also provided.

A temperature probe includes a sheath, a temperature sensitive element, and an insert. The sheath has a sidewall defining an interior space therein. The temperature sensitive element is disposed within the interior space of the sidewall and has an electrical characteristic that varies with temperature. The insert, which is formed of silicon carbide, is operably interposed between the sidewall and the temperature-sensitive element. A method of manufacturing a temperature probe is also provided. A temperature sensing system employing a temperature probe is also provided.

A temperature sensor includes a block body, a first thermocouple, and a second thermocouple. The first thermocouple includes a first strand, a second strand, a first insulator surrounding the first strand and the second strand, and a first metal sheath surrounding the first insulator. The second thermocouple includes a third strand, a fourth strand, a second insulator surrounding the third strand and the fourth strand, and a second metal sheath surrounding the second insulator. An end portion of each of the first thermocouple and the second thermocouple is buried in the block body.

A temperature sensor includes a block body, a first thermocouple, and a second thermocouple. The first thermocouple includes a first strand, a second strand, a first insulator surrounding the first strand and the second strand, and a first metal sheath surrounding the first insulator. The second thermocouple includes a third strand, a fourth strand, a second insulator surrounding the third strand and the fourth strand, and a second metal sheath surrounding the second insulator. An end portion of each of the first thermocouple and the second thermocouple is buried in the block body.

A thermocouple may have a first thermoelement wire formed of a first material and a first sheath covering at least part of the first thermoelement wire. The first sheath may provide thermal insulation and may be formed of a third material, different from the first material, that is subject to oxidation in response to exposure to a surrounding material. The thermocouple may further have a second sheath covering at least a first portion of the first sheath. The second sheath may act as a barrier between the first portion of the first sheath and the surrounding material and may be formed of a fourth material that is resistant to oxidation in the surrounding material. The first thermoelement wire may be joined, at a junction, with one of the first sheath, and a second thermoelement wire formed of a second material different from the first material.