Question:
Which among the following is an example of high shear mixer:
Which among the following is an example of high shear mixer:
Updated On: Jul 14, 2026
- Turbine mixer
- Jet mixer
- Sigma blade mixer
- Nauta mixer
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The Correct Option is C
Approach Solution - 1
The correct option is (C): Sigma blade mixer.
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The question asks which of these mixers is an example of a high shear mixer, meaning it applies strong, intense force to break apart and blend material rather than just moving it around gently. Let's check the working principle of each.
- Turbine mixer: This uses a rotating impeller to create flow patterns that circulate liquids or low-viscosity mixtures through the vessel. It provides moderate mixing action suited to fluids, not the intense shearing needed for thick or semisolid masses.
- Jet mixer: This works by forcing a high-velocity stream of liquid through a nozzle to agitate the contents of a tank. It is effective for blending low-viscosity liquids but does not deliver the strong kneading action associated with high shear mixing.
- Sigma blade mixer: This uses two interlocking, sigma-shaped blades that rotate toward each other inside a trough, gripping, folding, stretching, and shearing the material caught between them. This intense kneading action makes it the standard choice for mixing thick pastes, ointments, and dough-like masses, and is a textbook example of a high shear mixer.
- Nauta mixer: This uses a slow-moving screw that orbits inside a cone-shaped vessel, gently lifting and folding dry powders. Its action is deliberately gentle and low shear, designed to blend powders without damaging particles.
The sigma blade mixer's two counter-rotating blades apply the strongest kneading and shearing force of the four, which is why it is classed as a high shear mixer.
Therefore, the correct answer is Sigma blade mixer.
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