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Ultimate 4-Sensor ATO Aquarium Auto-Top-Off System - XP Aqua

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Product Description

With 2 X dual-optical sensors, the Ultimate ATO is the first ATO to include 4 sensors. The 4 sensors allow us to design a dual-stage overfill alarm that is less intrusive as well as a run-dry protection feature that prevents your sump from running dry: which is also a first.

The Ultimate ATO’s versatility is also unmatched. An efficient DC pump is included for a standard installation. If you require a larger ATO pump for a remote sump installation, a Socket Switch is included that allows you to run a pump up to 10A (1000W). A solenoid valve is also included for aquariums that are topped off directly with an RO/DI system.

  • World’s first 4-sensor ATO
    • One sensor for top-off detection
    • Two sensors dual-stage overfill alarm w/ QST Programming
    • One sensor for run-dry protection (also a first)
  • Versatile installation with accessories included
    • Efficient DC Pump – Standard
    • Socket switch for use with AC pumps (up to 10A)
    • Solenoid valve for use with RO/DI systems
  • Super precise water level control
  • Super easy installation; plug-and-play
  • No programming or adjustments required
  • Works in complete darkness

We designed the Ultimate ATO to offer you the ultimate protection with the ultimate convenience!


  • Power Input : 100~240VAC 50-60HZ
  • DC Pump :
    • Head : 8.2ft (250cm)
    • Flow rate : 74 gph (280lph)
  • Max Mounting Thickness : 1/2” (12.7mm)
  • AC Switch :
    • Capacity : 100~240 VAC 50~60 Hz
    • Max. Load : 10 A / 1200W @ 120VAC ; 10A / 2400W @ 240VAC
  • Solenoid Valve Power Consumption : 6W @ 12VDC

Product Videos

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