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Page 68 Stuart® Catalogue
Introduction
With the ever increasing variety of vessels being used in the
sciences, Stuart® offers a range of mixing products to give you the
ideal solution. Each entry also has a symbol to show the type of
mixing (see page 141 for guide). Some products also have a timer.
Rollers
A roller mixer is ideal for a gentle mixing action. It consists of
a number of motor driven rollers which rotate at either a fixed
or variable speed. When the samples are placed between these
rollers, typically in tubes or bottles, they are gently rolled. During
this rolling action, simultaneously a rocking action is applied
whereby the rollers are gently raised and lowered at one end.
This increases the effectiveness of the mixing whilst still providing
a subtle mixing action. Ideal for mixing blood samples, viscous
substances and liquid-solid suspensions where minimum aeration is
required or for aiding de-frosting of samples.
Rotators
Mixing by rotation is more vigorous than a roller mixer, typically
the sample, in either tubes or bottles, are turn end-over-end.
Rotators can be based on a rotisserie type design whereby a single
axis is rotated and samples are attached to this by a variety of
different methods. Alternatively, a rotator can take the form of
a disk rotated around its central point; samples are attached to
the edge of the disk, this form of rotator is less vigorous than the
rotisserie style as the angle of the disk can be lowered to lessen
the end over end action. Speed adjustment is available in both
types to alter the severity of the mixing action. Ideal for aerating
cultures, keeping biological samples in suspension and for general
mixing applications including smaller samples held in 1.5ml micro
tubes.
Vortex Mixers
Vortex mixers have an electric motor with the drive shaft oriented
vertically and attached to a cupped rubber piece mounted slightly
off-centre. As the motor runs the rubber piece oscillates rapidly in
a circular motion. When a test tube or other appropriate container
is pressed into the rubber cup (or touched to its edge) the motion
is transmitted to the liquid inside and a vortex is created. Most
vortex mixers have variable speed settings and can be set to run
continuously, or to run only when downward pressure is applied
to the rubber piece. It is an ideal mixing action for re-suspending
pellets, vortexing cell suspensions or drug extractions, mixing
tissue samples, enzymatic and RIA assays.
All mixers are provided with BioCote® antimicrobial protection.
See page 130 for more information.
SRT6D
Tube roller
SB2
Rotator
Stuart® Catalogue