Automatic Operation: The "Ultima" designation usually indicates an integrated or compatible automatic switching mechanism that turns the pump on when water is detected and off when the water level subsides. This often eliminates the need for a separate float switch. Solid-State Sensing Technology: Many Ultima products utilize patented Mirus™ field effect detector cells. This is a key feature offering several advantages: No Moving Parts: This increases reliability and reduces the chance of mechanical failure. Totally Sealed Electronics: The sensor cells are sealed and never come into direct contact with the water, preventing corrosion and being unaffected by oil or debris. Mercury-Free: Environmentally friendly design without the use of mercury. False Start Prevention: Often includes a time delay (e.g., 3 or 8 seconds) to prevent the pump from cycling on and off due to sloshing water.