Kamoer ATO One Automatic Top Up UnitThe Kamoer ATO One Automatic Top Up Unit is a smart automatic water top up unit used to replenish water lost through evaporation. It comes complete with an optical sensor for accurate monitoring of the water level and a back up float sensor. No programming is required to set up the unit, simply position the sensors on their magnetic mounts, connect the pump and away you go. Everything needed to set up the unit is included in the kit and a third sensor