Immersion temperature sensor

A temperature sensor arrangement, comprising:

• a temperature sensor comprising a thermocouple having a measurement point, a holder with a contact surface for coming into contact with a component to be heated and with an opening, wherein electric connections of the thermocouple are led through the opening starting from the measurement point, a first metal jacket arranged on the contact surface of the holder or connected to the holder so as to pass at least partly through said contact surface such that an interior of the first metal jacket is connected through the opening to a side located opposite the contact surface or to another side of the holder and a second metal jacket, wherein the measurement point is arranged in an interior of the second metal jacket and the second metal jacket is located at least with one section in the interior of the first metal jacket and the second metal jacket can be or is connected at least by a partial area of the one section to the first metal jacket such that the second metal jacket is fixed in terms of its position relative to the first metal jacket;
• and
• a component to be heated, the component to be heated having a temperature monitored with the temperature sensor, wherein the contact surface of the holder is in contact with the component to be heated, that the component to be heated having a recess with a bottom, in which recess the first metal jacket is received, and the second metal jacket protrudes just as far into the recess as the first metal jacket.