Anti-interference ultrasonic liquid level meter

The utility model discloses an anti-interference ultrasonic liquid level meter in the technical field of liquid level meters, which comprises a main body, the upper end of the main body is connected with a display screen, the outer part of the upper end of the main body is connected with a metal shell, one side of the upper end of the main body is connected with a signal line interface and a power line interface, and a mounting plate is welded in the middle of the main body. The reflecting cover is screwed through the thread at the bottom end of the main body, the backing ring on the main body is used for knob limiting of the reflecting cover, the backing ring is in contact with the reflecting cover, the reflecting cover is in a vertical installation state, fan-shaped ultrasonic waves emitted by the bottom end of the main body are reflected through the reflecting cover, the ultrasonic waves are concentrated at the right lower end to be transmitted, fan-shaped transmission is avoided, and the ultrasonic wave t