Abstract: A liquid level controller comprises of a control circuit, a control box, a sump pump, and a liquid level indicating means, the liquid level indicating means comprising a high level indicating device and an impulse indicating device, the high level indicating device and the impulse indicating device comprising pipe bodies, magnetic switches, floating element or impulse element. The pipe body of the impulse indicating device has a connecting pipe connected to the side thereof. The magnetic switches located on the top of the pipe bodies and connected to the control circuit with electric wires. When the liquid surface raises and buoys the floating element of the high level indicating device to contact the magnetic switch, the magnetic switch produces a signal to the control circuit and the sump pump is started to draw the liquid out of the tank.