Rotor: Select from 4 Speed: Up to 4,000 RPM Force: Up to 2,000 xg* Capacity: Up to 20 places* Test Tube Sizes: Up to 30mm x 125mm* *Depending on rotor selection The Horizon Model 653 is a low-cost, variable speed, horizontal centrifuge. The key to the Horizon is its patented rotor design which allows the tube holders to swing to a horizontal position without the use of trunnion rings. The advantage of this system is lower cost and extreme ease-of-use. The unit is controlled by an electronic timer for precise spin times settable from 1 to 30 minutes. The current status of the machine (running, latched, unlocked) is displayed on the control panel. Samples may be safely viewed through the transparent lid. For additional safety, entry into the rotor chamber is restricted until the rotor has come to a stop. A cycle counter has been included to monitor machine usage for routine maintenance scheduling. UL/CSA compliant.