Xd series oil level indicator is a special product for fully sealed transformer. This product is made of high-quality seamless steel pipe or alloy aluminum, with reliable electrostatic spraying and sealing, simple operation, convenient installation, shorter working hours, and multiple functions, which can be used as the connection of oil injection pipe. As the company adopts threaded and flanged connection, the sealing rubber ring can ensure reasonable compression, effectively prevent ultraviolet radiation, and make the rubber ring have a longer service life. The oil level in the observation window can be observed 360 ° at any angle. The blue color indicates that the oil level in the tank is normal, while the red color indicates that the oil level in the tank is reduced, and the transformer oil should be replenished in time.