The Liberty OTC-115-5 OilTector Control and Alarm is designed to distinguish between water and oil before signaling an alarm once the liquid level reaches the alarm probe and the mechanical float. It activates when the control panel signals High Oil or High Water. This Liberty OTC-115-5 OilTector Control and Alarm comes with a 50' power cord. It runs on 115V single phase. It can work with pumps with a maximum of 1 hp. The alarm is powered by 120 VAC from standard wall outlets, transformed to 11VDC. A battery back-up can be provided by installing a 9V battery. More details are available in the specification sheets. The Liberty OTC-115-5 OilTector Control and Alarm is recognized for meeting the required environmental performance standards. Liberty, the company that makes and innovates high quality pumps, is relied on by hundreds of professional contractors each day. Liberty has been cited as one of Rochester's Top 100 Companies for twelve years.