Sterimixer® The Original Magnetic Coupled Mixer for Pharmaceuticals

The Sterimixer may be the most widely used magnetically coupled mixer for bio-pharmaceutical applications world-wide. It consists of the following major components: impeller, bearing, weld-plate, drive unit and control box. All wetted parts of the impeller and the weld-plate are made of AISI 316 L (EN 1.4404), while other alloys are available on request. Interchangeable impeller designs are available.

Sterimixer Features
– Effective mixing
– Mixing to the Last Drop
– CIP/SIP Design
– Removable drive-units
– Bottom Mounted
– Prevents sedimentation
– Interchangeable Impellers
– Low shear Design
– AutoclavableVariable Speed
– High Performance
– Full containment
– Reduces foaming
– For vessels from 5 liters – 30.000 liters
– Fully CIP/SIP Clean In Place / Steam In Place.
– No Need for Baffles

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The SMA model features a patented flow channel design. During cleaning, the flow channels force cleaning fluid through the bearing area, providing very effective and repeatable cleaning results. SMA generates very low shear forces, which makes it ideal for applications with shear sensitive products, such as mammalian cell cultures.

With respect to mag mixer impellers, a closed impeller is one that must be submerged to be cleaned. As the impeller is rotating, centrifugal force is drawing the fluid into the area around the bearings. This fluid is flushed out the small holes in the top of the impeller.


SMO is an open design that exposes all surfaces to the cleaning solution just by means of directing flow from a spray ball to the impeller head. It is not necessary to submerge it during cleaning.

With respect to mag mixer impellers, an open impeller is one that can be cleaned during CIP by means of a spray ball action, without submergence.


The SMMS design provides higher shear forces for applications where incorporation of light or hydrophobic powders is needed.  The impeller is also an open design that does not require to be submerged during cleaning.







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