Laboratory Mixers

Laboratory mixers are used to mix, emulsify, homogenize, disintegrate and dissolve samples. There are several basic types of products. Dual-shaft mixers use a three-wing or helical anchor to generate flow and remove mixed materials from the vessel wall. Double-planetary mixers use a rectangular or finger-shaped blade to feed material to an orbiting high speed dispenser (HSD). Single-stage rotor/stator devices use a stationary stator to turn an immersed rotor at high speeds. The blades pass each port in the stator and expel material at a high velocity into the surrounding mix. Multi-stage rotor/stator mixers increase shearing to produce smaller particle sizes and more homogenous batches. When two to four rotor/stator pairs are nested concentrically, the mixed material that moves outward from the center of the unit is subjected to a rapid, sequential shearing. Some mixers can be operated at variable speeds. Others are designed for continuous speeds.

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