Rated voltage: There are various specifications, including 110/220V, 110/240V, 220/380V, 240/380V, etc.
Functional features: liquid level controller and alternating relay in the same body, which can save space and simple wiring; Alarm circuits can be installed as needed for emergency treatment; It can be switched to unilateral operation using a slide switch; When there is no water in the water source, the controller immediately loses power to prevent the motor from running idle.