A temperature input unit includes a disconnection detection circuit that measures a temperature of a measurement target with at least one of a thermocouple or a temperature measurement resistor and feeds a disconnection detection current for disconnection detection to the thermocouple and a compensating wire connected to the thermocouple. A controller controls, before measuring the temperature of the measurement target with the thermocouple, a terminal switch and an input circuit switch to connect the compensating wire to a temperature measurement resistor input circuit and an A/D converter, and calculates a predicted value of a voltage drop resulting from resistance of the compensating wire occurring in response to the disconnection detection current. The controller controls the terminal switch and the input circuit switch to connect the compensating wire to a thermocouple input circuit and the A/D converter, and subtracts the predicted value from a measured value of the thermoelectromotive force detected by the thermocouple input circuit to calculate a corrected measured value of the thermoelectromotive force.

Various embodiments include an electronic circuit for driving a thermocouple element comprising: contact electrodes for connecting cold-end electrodes of the thermocouple element; and a measurement circuit to measure a thermo-voltage generated by the thermocouple element. One of the electrodes is connected to a supply voltage and a ground potential over a voltage divider having resistors with pre-defined resistance values such that a common mode voltage between the contact electrode and the ground potential is in a pre-defined range. If a leakage resistance effective between the contact electrode and the ground potential is greater than a pre-defined threshold, a processor compares the common mode voltage to the pre-defined range and generates a calibration value for the measurement circuitry if the common mode voltage is outside the range.

Various embodiments include an electronic circuit for driving a thermocouple element comprising: contact electrodes for connecting cold-end electrodes of the thermocouple element; and a measurement circuit to measure a thermo-voltage generated by the thermocouple element. One of the electrodes is connected to a supply voltage and a ground potential over a voltage divider having resistors with pre-defined resistance values such that a common mode voltage between the contact electrode and the ground potential is in a pre-defined range. If a leakage resistance effective between the contact electrode and the ground potential is greater than a pre-defined threshold, a processor compares the common mode voltage to the pre-defined range and generates a calibration value for the measurement circuitry if the common mode voltage is outside the range.

A thermocouple assembly may feature a plurality of temperature sensors formed by thermocouple junctions. The sensors may be disposed within an inner diameter of the tubular element and sealed within the tubular element by thermally conductive material. An air gap may be defined by the thermally conductive material and the interior diameter of the tubular element between each pair of adjacent temperature sensors to improve thermal isolation.

A thermocouple assembly may feature a plurality of temperature sensors formed by thermocouple junctions. The sensors may be disposed within an inner diameter of the tubular element and sealed within the tubular element by thermally conductive material. An air gap may be defined by the thermally conductive material and the interior diameter of the tubular element between each pair of adjacent temperature sensors to improve thermal isolation.

The present invention relates to a thermocouple (1) for measuring the temperature of a high-voltage component, having a metal first conductor (2) made of a first material and a metal second conductor (3) made of a second material, wherein the first material differs from the second material, wherein the first conductor (2) and the second conductor (3) are mechanically asymmetrical and electrically symmetrical with respect to one another. The invention also relates to a temperature measuring system (10) having the thermocouple (1) according to the invention and to a method for producing a thermocouple (1) according to the invention.

The present invention relates to a thermocouple (1) for measuring the temperature of a high-voltage component, having a metal first conductor (2) made of a first material and a metal second conductor (3) made of a second material, wherein the first material differs from the second material, wherein the first conductor (2) and the second conductor (3) are mechanically asymmetrical and electrically symmetrical with respect to one another. The invention also relates to a temperature measuring system (10) having the thermocouple (1) according to the invention and to a method for producing a thermocouple (1) according to the invention.

A temperature sensor (1) includes: a temperature sensitive element (90); a sheath member (20) provided on a rear end side of the temperature sensitive element, and including a pair of sheath core wires (21) connected to the temperature sensitive element, and a sheath outer tube (22) accommodating the sheath core wires inside an insulation material; a pair of lead wires (80) disposed on a rear end side of the sheath member, and directly or indirectly connected to the respective sheath core wires exposed more on a rear end side than the sheath outer tube; and glass-braided insulation covering portions (25) individually covering a pair of respective connection portions (23) of the sheath core wires and the lead wires, so as to insulate between the pair of the connection potions, in a rear end from the sheath outer tube.

A temperature sensor (1) includes: a temperature sensitive element (90); a sheath member (20) provided on a rear end side of the temperature sensitive element, and including a pair of sheath core wires (21) connected to the temperature sensitive element, and a sheath outer tube (22) accommodating the sheath core wires inside an insulation material; a pair of lead wires (80) disposed on a rear end side of the sheath member, and directly or indirectly connected to the respective sheath core wires exposed more on a rear end side than the sheath outer tube; and glass-braided insulation covering portions (25) individually covering a pair of respective connection portions (23) of the sheath core wires and the lead wires, so as to insulate between the pair of the connection potions, in a rear end from the sheath outer tube.

The present invention provides a thermocouple probe (10). The probe includes a first pair of thermocouple wires (50) joined to form a first thermocouple junction (56) at a sensing tip (14) of the thermocouple probe and a cooling arrangement (20) defining a cooling pathway (34) adjacent to a cooled portion of the probe. The sensing tip projects beyond the cooling arrangement and is cooled during use by conduction to the cooled portion of the probe. The probe further includes a second pair of thermocouple wires (54) joined to form a second thermocouple junction (52) in the cooled portion of the probe and adjacent to the sensing tip. The present invention also provides a method and a system for determining the gas temperature (Tg) in a high temperature environment, such as a jet engine.