Magnetic 
stirrers 
These digitally controlled magnetic
stirrers were originally designed for stirring solutions in standard 1
cm spectrometer cell. With 12x12x7 mm remote solid state motor (SSM)
they are ideally suited for this application. Electronic stirrers can also
be used in many different special applications that may benefit from the
absence of mechanical vibrations, low electromagnetic interference, stable
stirring rate even at low speed*, small size and hermetic design of SSM.
Models MS-21A & B are similar but B version allow fine adjustment of
the output power. Some users find it helpful when extremely gentle
stirring is required. Model MS-22A has RH-50 type SSM integrated into the
control unit and two outputs for external SSM**. It can be used as
a regular magnetic stirrer for up to 500 ml volumes atop of a control unit,
and also as a stirrer for special applications with remote SSM. High efficiency
of these stirrers allow the use of batteries as a power source for complete
elimination of 50-60 Hz interference or for use in the mobile laboratories.
Battery power supply (Part # BP4D) for
4 D size batteries need to be ordered separately. Standard power
supply (120 V AC to 6-9 V DC wall transformer) is included. If you
need one for 220-240V, please add US $15.00 to the price of control unit.
MS-23 stirrer controller is integrated
into 120V AC wall transformer enclosure. This unit does not take
any bench space at all, just an available AC outlet close to the place
were stirring is required.
* - Due to the discrete switching of the magnetic field, stable rotation
require the right size of a stirring bar and flat flask bottom.
**- Please note that external SSM are NOT included with control units
and must be ordered separately. All controllers are capable to drive
any SSMs listed below.
SPECIFICATIONS:
| Control Unit |
MS-21A,B |
MS-22A |
MS-23 |
| Dimensions |
1.5"x 5"x 5" |
2" x 4"x 6" |
1.5"x2.7"x3.5" |
| Number of output connectors for
SSM. |
2 |
2 |
1 |
| Integrated SSM |
No |
Yes |
No |
| Stirring speed (rpm) |
60-600 |
60-600 |
60-600 |
| Remote SSM |
RH-12 |
RH-12M |
RH-25T |
RH-50, RH-50T |
| Dimensions (mm) |
12x12x7 |
12x12x15 |
25x25x20 |
50x50x20 |
| Recommended size of stirring bars (mm) |
3-6 |
3-6 |
6-12 |
15-25 |
| Max distance between SSM & Stir. bar. (mm)* |
4 (5x3) |
6 (5x3) |
18 (8x2) |
10 (20x7) |
"T" indexed SSM are similar to the original, but have M4 or M6 mounting
hole, bottom center.
* - In water, at 200-300 rpm. Size of stirring bar used in tests
is given in brackets (length x diameter).
Low
Speed Magnetic Stirrer
This stirrer is designed for special applications that
require stable low speed stirring. In most stirrers magnet is driven
directly by a standard electric motor which cannot provide stable slow
rotation even with electronic stabilisation circuits. MS-30
have geared motor that provide high torque output and stable rotation at
low speed. This stirrer is well suited for stirring of high viscosity
liquids and for other applications when gentle, slow stirring is required.
Part #
MS-30
SPECIFICATION
Speed
fixed: 4-6 rpm
Dimensions
100x150x55 mm (6"x 4"x 2")
Power
120 or 240V AC
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