The Lab-Line Titer Plate Shaker can produce a variety of conditions from gentle stirring to vigorous vortexing with solid-state speed controls from 40 to 1100 rpm with a rotary dial. Set timer for continuous operation or timed runs from 30 seconds to 5 minutes (adjustable in 30 second increments) shaker automatically shuts off at end of timed run. Minimize crosstalk between wells with 0.12" orbit. Units operate continuously even in temperature ranges from 0°C to 40°C and humidity conditions from 20% to 80% non-condensing enabling them to be used in a variety of environments. Finger slots facilitate titer plate removal. Use independent start switch to activate shaker once you have preset time and speed - use for run repeatability. Maximum load 2 lbs (1kg), four deep well plates. Shipping weight: 25 Lbs.