Liquid level meter capable of being automatically cleaned

The invention discloses a liquid level meter capable of being automatically cleaned, and belongs to the technical field of coking equipment, the liquid level meter comprises an ammonia water storage tank and a liquid level meter, and further comprises a steam pipeline and an air inlet gate valve I. The steam pipeline is connected with the top of a main body pipe and can input steam into the main body pipe; a first air inlet gate valve is arranged on the steam pipeline to control the steam inlet amount and opening and closing of the steam pipeline, a universal shaft is arranged at the joint of the floating ball and the connecting rod, and the floating ball can rotate around the universal shaft. According to the liquid level meter capable of being automatically cleaned, the problem that the main body pipe of the liquid level meter is easily blocked by medium crystal precipitates is solved, the technical problem that the liquid level meter is blocked due to the fact that the liquid level in a storage tank fluctu