Patent ID: 7275867

Claim:
A probe assembly of an infrared thermometer detecting infrared rays emitted by a thermal radiation source so as to measure a surface temperature of the thermal radiation source, comprising: a taper plastic tube including a radiation collection end toward the thermal radiation source and allowing the infrared rays to go through; a conductive shell placed in the plastic tube and including a first open end adjacent to the radiation collection end; an infrared radiation sensor placed in the first open end of the conductive shell and including a hot junction facing the thermal radiation source and a cold junction facing a side opposite to the radiation collection end; a first adiabatic ring placed between the plastic tube and the conductive shell and preventing heat of the plastic tube from being directly conducted to the conductive shell; a second adiabatic ring placed between the conductive shell and the infrared radiation sensor; and an adiabatic supporter placed in the conductive shell and including a first end against the surface of the infrared radiation sensor adjacent to the cold junction, wherein the first end of the adiabatic supporter shows a cross shape and several leads go through diagonal gaps of the cross shape.