To provide a sensor device which is capable of high temperature detection using self-heat generation without providing a dedicated terminal and suppresses an increase in cost with an increase in chip occupation area due to the addition of a test pad. A sensor device is configured to include an active logic switching circuit for switching an active logic of an output driver and perform a heating inspection while switching the active logic of the output driver during an inspection process with the output driver as a heat generation source.

The present invention relates to an Electro-Thermal Heating element for a wind turbine blade comprising an electrically conductive resistive material; two active busbars for supplying electrical power to the electrically conductive resistive material; and at least one dummy busbar at a predetermined spacing between the two active busbars on the electrically conductive resistive material. The present invention is also directed to a method of repair of the Electro-Thermal Heating Element.

The present invention relates to an Electro-Thermal Heating element for a wind turbine blade comprising an electrically conductive resistive material; two active busbars for supplying electrical power to the electrically conductive resistive material; and at least one dummy busbar at a predetermined spacing between the two active busbars on the electrically conductive resistive material. The present invention is also directed to a method of repair of the Electro-Thermal Heating Element.