The Oil Level Gauge is an instrumentality by which we can manage the level of liquid/oil inside the tank of power transformer. It also provides us an alert low oil level indicant with producing mercury switch. It is attached at the bottom of the keeper tank that is shown in figure. The magnet of this device is attached inside the conservator drives and the magnet placed is fixated outside of the curator tank of power transformer. This device is employed to point the position of transformer insulating oil level. Functional as  a mechanical device, it comes with the part of one float, bevel gear arrangement and a indicating dial. Transformer Magnetic Oil Level Gauge is supplied with precision in operation and insure accuracy.