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Duetto 2 ATO System


Duetto 2 ATO System is backordered and will ship as soon as it is back in stock.


  • NEW! Controller programming & circuitry for added system protection
  • NEW! Improved sensor design for longer durability
  • World's smallest dual-sensor ATO
  • Two layers overfill protection
  • Intelligent QST programming
  • Secondary optical sensor
  • Super precise water level control
  • Super easy installation; plug-and-play
  • No programming or adjustments required
  • Works in complete darkness

Why Choose Duetto2 ATO ?

With huge features jammed in a tiny package, the Duetto2 is the perfect ATO for your aquarium. XPAqua’s proprietary dual-optical sensor packs two precise level sensors in one incredibly small package. In addition to keeping your water level constant, the two sensors also work in concert with the intelligent QST programming to help prevent overfilling.

All the installation parts are included and a magnetic coupling allows you to easily mount or adjust the dual-sensor. Installation takes just seconds so you can spend less time working on your aquarium and spend more time enjoying your aquarium.


  • Power Adapter:
    • Power Input : 100-240 VAC, 50-60 Hz
    • Cable Length : 6 ft (180 cm)
  • DC Pump :
    • Head : 8.2 ft (250 cm)
    • Flow Rate : 74 gph (280 lph)
  • Power : 4.8 W @ 12 VDC
  • Cable Length : 6 ft (180 cm)
  • Max. Mounting Thickness : 1/2” (12.7 mm)
  • Length of Cable between Sensor and Controller : 6 ft (180 cm)