To obtain an electrical machinery and apparatus in which the average temperature of an insulating oil is measured.

A temperature sensor 15 and a temperature sensor 16 are arranged inside a tank 11. The temperature sensors 15, 16 are connected to a bourdon tube. In the case of this constitution, the temperature sensors 15, 16 are immersed in the upper end part and the lower end part inside an insulating oil 13. As a result, since the bourdon tube is deformed according to the composed temperature in the upper end part and the lower end part of the insulating coil 13, the average temperature of the insulating oil 13 is measured on the basis of the deformation amount of the bourdon tube.