Mutual standby dual liquid level sensing device for prefabricated pump station

The utility model discloses a mutual standby dual liquid level sensing device for a prefabricated pump station, which comprises an ultrasonic liquid level sensor and a floating ball liquid level sensor, the ultrasonic liquid level sensor and the floating ball liquid level sensor are both mounted on the inner side of a pump station body, the ultrasonic liquid level sensor is positioned at the upper end of a barrel of the pump station body and is mounted through a support, and the floating ball liquid level sensor is positioned at the lower end of the barrel of the pump station body. The floating ball liquid level sensor comprises a pump starting floating ball, a pump stopping floating ball, a stand column and an anti-winding protection assembly. The pump starting floating ball and the pump stopping floating ball are distributed on the upper side and the lower side in the pump station body. The stand column is perpendicularly fixed to the inner side of the pump station body, two anti-winding protection assembli