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An Introduction to Laboratory Mixers


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Laboratory mixer is one of the most used laboratory mixing equipments. Whether it is your school laboratory or a pharmaceutical lab, laboratory mixers are needed everywhere. The main function of laboratory mixers are to mix, emulsify and dissolve the samples properly.

Types of Laboratory Mixers
For mixing purposes in laboratories you can use one of the following basic types of lab mixers.

  • Dual-shaft mixers: Such types of mixers use a three-wing or helical anchor to produce flow and remove the mixed materials.
  • Double-planetary mixers: These mixers use a finger-shaped or rectangular blade to introduce samples to an orbiting high speed dispenser.
  • Single-stage rotor: Stationary stators are used in these devices 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: Such mixers increase shearing to generate smaller particle sizes and more homogeneous batches. These mixers have two to four pairs of rotor/stator that are nested concentrically and the mixed material, that moves outward from the center of the unit, is introduced to a rapid, sequential shearing.

Performance Specifications of Lab Mixers
While selecting a laboratory mixer you should analyse the following performance specifications:

  • Speed: The range of speed is usually measured in rpm or revolutions per minute.
  • Capacity: The volume of the mixing vessel is measured in liters or gallons.
  • Viscosity: Viscosity is measured in cps or cycles per second.
  • Operating range & temperature are measured in degrees Fahrenheit or Celsius.

Laboratory mixers need the continuous introduction of samples as they work. Usually the samples are introduced in two ways. On the basis of sample supply laboratory mixers can be divided in two categories. They are continuous mixers and batch mixers. Continuous devices need continuous supply of the sample while batch mixers accept only a fixed amount of sample.

I am a laboratory analyst by profession working in this industry from last 10 years. I have been running a site on laboratory equipments. It includes the largest range of laboratory apparatus and other updated info on market, trade fairs, news, etc.


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