Usually used at the inlet pipes of storage tanks, pump rooms, sewage treatment plant inlet gates, etc., when the water level is below the design level, the ElectroLimiter QC is always open, and the ElectroLimiter QC is fully closed when the water level reaches the closing water level. When an emergency occurs, such as a power outage, the ElectroLimiter QC can be closed immediately to prevent flooding in the pump room or factory area.