The RT10, RT11 and RT12 variable speed rotating mixers are designed to mix 0.5 ml, 1.5 ml and 2.0 ml centrifuge tubes in an end-over-end motion and 15 ml and 50 ml tubes in a horizontal rolling motion or at an angle for end to end mixing while rotating almost horizontally at speeds varying from 4–40 rpm using a simple knob control. They can also hold 12/13 mm and 15/16 mm test tubes or Vaccutainer tubes.

The RT10 is provided with a mounting rack that holds 50-0.5 ml centrifuge tubes and 48-1.5ml centrifuge tubes. The RT11 is provided with a mounting rack that holds only 1.5 ml centrifuge tubes, 88 in total. The RT12 is provided with a mounting rack holding 14-12/13 mm and 14-15/16 mm capped test tubes or Vaccutainer tubes.

Accessory racks can be ordered that hold 6-50 ml tubes or 16-15 ml tubes. Changing from the provided rack to accessory racks can be done in just minutes. The rod holding the racks is easily removed for changing from one rack to another.

Each unit comes complete with rotating mixer, appropriate sample tube rack, 12 VDC bench top power supply that takes AC inputs from 100 to 260 VAC, 50/60 Hz, 3-wire AC line cord for the country of use and user’s manual. Both have a full 12-month warranty. It is UL, CSA and CE compliant.