Multiple samples can be processed simultaneously in the Benchmixer XLQ's large capacity racks, saving time and preventing operator fatigue. The vigorous, consistent shaking ensures all samples are exposed to identical conditions within the same batch of samples, as well as between batches. The BenchMixer XLQ creates a true vortex in vertical sample racks by holding the top of the tube stationary while the bottom rotates in a 3.6mm orbit. Time and speed are precisley controlled by the digital microprocessor. A pulse mode allows for more vigorous mixing. Quiet operation, minimal vibration and a long service life are guaranteed by the precisely balanced drive system and powerful motor.  Using the BenchMixer XLQ is simple. To load the sample racks, loosen the knobs on the stationary steel rods and raise the top sample plate. One rod is shorter than the other, allowing the plate to be lifted up and swiveled to one side. After samples are loaded, lower the plate into place and tighten the knobs. Select the desired speed and run time on the digital control panel and press start. The BenchMixer XLQ can perform unattended mixing for as little as 1 minute or up to 100 hours.  While the BenchMixer XLQ is configured primarily for QuEChERS protocols, additional racks are available to accommodate nearly any type of vessel commonly found in the laboratory (ask for details). Built for heavy-duty use, the instrument carries a 2 year warranty. Speed Range: 500 to 2500rpm Orbit: 3.6mm Timer: 1min. to 99 hr 59min. Platform Dimensions: 12 x 7 in. / 30 x 17.8 cm Dimensions: 15 x 9.2 x 16.5 in. 38.5 x 23.5 x 42cm Weight: 13kg / 29lb Warranty: Two Years Electrical: 100 to 240V, 50-60 Hz For use with QuEChERS and other sample prep methods Powerful, hands-free shaking/vortexing Pulsing program for interval mixing Supplied with QuEChERS rack starter kit:  7 x 50ml tubes, held horizontally 50 x 15ml tubes, held vertically 50 x 1.5/2.0ml tubes, held vertically