Patent ID: 7569798

Claim:
A temperature sensor based on resistance measurement comprising: a sensor element with a temperature-dependent resistor made from a metal selected from the group of tungsten and molybdenum having a positive temperature coefficient, said sensor element having a first connection wire and a second connection wire, wherein said sensor element has a U-shape with said first connection wire positioned parallel to said second connection wire; and an envelope in which said sensor element is located and said first connection wire and said second connection wire pass through said envelope, wherein said envelope is made from an insulating material having a first area comprising a reflective coating for blocking thermal radiation and having a second area without said reflective coating having a high transparency to thermal radiation, said envelope forming a gas-tight container comprising at least one inert gas selected from the group consisting of nitrogen, helium, halogen, and argon, said envelope having an internal pressure different from that of an external pressure.