Surface thermal resistance element by the special treatment of the wire (copper or a platinum wire) winding, they bear towel at the front end of the thermometer, and the general axial thermal resistance compared to, end face thermal resistance and can correctly and quickly reflect the actual temperature conditions was measured by the end, it make a lot, and diverse varieties, suitable for in steam turbine and motor bearing or other body surface temperature. Some end thermal resistance installation because it leads to the resistive element is connected, so will lead and pump face thermal resistance synchronous rotation, so as to ensure that end thermal resistance in the installation is not man-made damage, but the actual installation process will inevitably appear this kind of circumstance. Due to the emergence of this situation, the RTI company to increase research efforts in developing successful special the end face of the heat resistance, the end surface of the thermal resistance at the time of installation only need to twist the outer end of the screw can be, and do not need to lead and pump face thermal resistance to rotate synchronously.