4 Startup procedure
50108226_02.2007
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Thermo Scientific
Thermo Scientific has developed a new magnetic stirring bar KOMET (Figure 6). It
contains a high-quality super-strong samarium-cobalt magnet. KOMET shows a strong
magnetic force. The stronger attraction to the magnetic alternating field provides the
stirring bar with very efficient stirring properties. Even if there are greater distances (e.g.
in high measuring cylinders) the stirring force will be maintained.
The stability of the stirring bar will not be impaired if the vessel has a curved bottom.
The strong magnetic coupling in samarium-cobalt magnets will also increase friction.
The standard design of the KOMET magnetic stirring bar is therefore unsuitable for
stirring liquids containing particulate matter (such as mud) or for stirring in vessels with
a rough interior surface. Some of the KOMET stirring bars are specially fitted with a
wear-resistant glide ring for use under excruciating circumstances, such as when
stirring vessels feature rough plastic or stainless-steel bottoms or if the media to be
stirred contain solids (FigureFehler! Verweisquelle konnte nicht gefunden
werden.7).
Any risk of demagnetisation by external magnetic fields is completely eliminated. All
KOMET series stirring bars can be readily recognized by their two conical ends.
Figure 6: KOMET stirring bar.
Side view (left) and cross-section through central portion (right).
Figure 7: KOMET stirring bar with glide ring
