Skimmer Security Made Simple Smart Skimmer Security by AutoAqua uses a uniquely-designed contactless optical sensor to prevent the protein skimmer from overflowing. No moving parts to service or fail to make this unit incredibly reliable. A magnetically coupled sensor makes it super easy to install and adjust to the desired level in the collection cup. No need to purchase new lids or DIY modifications to the collection cup! As the level in the cup gets too high, Smart Skimmer Security will shut down the skimmer immediately to prevent the skimmer from overflowing. The auto time delay function prevents false alarms due to power outages. Key Features: No DIY modifications to the collection cup are needed for installation Plug-and-play design - automatically recognizes when mounted Unique magnetically coupled sensor Extremely simple to set up Avoid false alarms during power outages with the auto time delay function Specifications: Power Input / Output: 100-240 VAC, 10 Amp Max. Power: 1100 W for 110 VAC / 2200 W for 220 VAC Skimmer Sensor: Max. Mounting Thickness: 5/16 inch (8 mm) Wet Side Magnet Size: 20 mm x 17 mm (Diameter x Thickness) Cable Length: 10 feet (300 cm)