Smart ATO-Automatic Top Off System
Automatic Top Off System with Controller & Sensor in OneWhat is Smart AFS Technology?The Smart ATO is a unique Auto Top Off system with a patent pending contactless digital sensor that monitors and automates refilling evaporated water. Best of all it is ver easy to install and contains no moving parts that can fail. Integrated with AFS (Auto Feedback Security) technology which provides real-time fail safe protection against failure. You simply move the outside controller to adjust your sump to a desired water level. Its that easy!Mounts to Clear Glass or Acrylic sumpsMax wall thickness: 1/2 inch (12.7mm)Max distance for sensor: 1 inch (25.4mm)Everything you need is includedController/Sensor, Power Adapter,  DC brushless pump capable of pumping to a height of ~6.5 feet and a maximum flow rate of ~74 gph, 6.5' of Water Tubing with Universal Holder. FEATURES    Contactless Optical Water Level Sensor    - NO MOVING PARTS!    - ZERO CHANCE OF LEAKING VOLTAGE      Smart AFS(Auto Feedback Security) Technology    Very Easy Setup    Safely keep water & salinity levels (in Marine Aquariums) stable    Adapts to most aquarium/sumps with walls up to 1/2inch    2 year Warranty