3 Function
Thermo Scientific
10
50108213_02.2007
3 Function
The magnetic stirrers MAXI DIRECT, POLY 15 and MULTIPOINT 6 / 15 are used for
chemical, microbiological, biotechnical or medical purposes, e.g.:
Growing microorganisms (e.g. aerating and growing bacteria cultures),
Dissolving nutrient media and solids,
To prevent the settling of suspended matter,
Titration.
The MAXI DIRECT magnetic stirrer is suitable for stirring larger volumes of liquid.
Due to its far-reaching magnetic field, it is suitable for highly viscose media or
samples in which sediments tend to form.
The magnetic stirrers POLY 15 and MULTIPOINT 6 / 15 can stir liquids in several
vessels simultaneously.
The magnetic stirrers are well suited to the growing of bacteria cultures outside the
incubator. If a power setting of 20 W is selected, the plates will heat to 10-20 K above
the ambient temperature. Heat will accelerate growth. However, the stirrers cannot
be used in incubators.
The MAXI DIRECT and MULTIPOINT 6 / 15 power settings can be adjusted in four
steps (5/10/15/20 watts). Use more power for larger quantities and more viscous
liquids and reduced power for long-term operation without heat generation.
You can stir liquids in various shapes of vessel (e.g. Erlenmeyer flasks, beakers). As
the rotation speed can be variably adjusted, liquids can be moved both gently as well
as vigorously mixed.
The stirring vessel contains a magnetic stirring bar. When the stirring vessels are
placed on the stirring points (6), a electromagnetic field will move the magnetic
stirring bars. The drive of the magnetic stirrer is contructed without the use of moving
parts, such as motors, bearings or belts, and is therefore completely wear-free.
You can set the speed in increments of 10 rpm.
Selectable speed range:
MAXI DIRECT and MULTIPOINT 6 / 15: 80 to 2,000 rpm
POLY 15:
130 to 990 rpm
The digital display (7) shows the current speed of the magnetic stirring bars. All
magnetic stirring bars will be moving at the same speed. On the MULTIPOINT 6,
magnetic stirring bars on neighbouring stirring points (6) will rotate in the same
direction. On the POLY 15 and MULTIPOINT 15, however, the magnetic stirring bars
will rotate in opposite directions.
The Memory function saves the setting last at switching off the device, even if
disconnected from mains supply for longer periods of time.
