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Magnetic stirrer

Magnetic stirrer is the device used in laboratories to mix and keep liquids moving with the solutions they work with. The magnetic stirrer in fact has many applications, including the very popular creation of flavourings for electronic cigarettes today. By constantly keeping the liquid in motion, the magnetic stirrer accelerates certain reactions. If one were to wait for the 'natural' maturation times of certain reactions, there would be at least 10 times less production in chemical laboratories. Stirring and the constant movement of solutions solve this problem and shorten the waiting time considerably.

Magnetic Heating Agitator

The ARE magnetic heating stirrer is widely used in research and development, industrial and university laboratories worldwide. The magnetic heating stirrer is equipped with heating plates, which are usually coated with a special protective layer to ensure even heat distribution over the entire surface, as well as excellent resistance to chemicals. Its features make the magnetic heating stirrer ideal for many applications, including the preparation of solvents at high temperatures.

Magnetic Vibration Agitator

Suitable solution for the most diverse mixing requirements, ensuring the highest performance in terms of speed, precision, reliability and safety.

Magnetic Microstirrer

Specially designed for microtitrations, where a reliable and small instrument is needed.

Multistirrer Magnetic Agitator

Magnetic stirrers capable of stirring up to 6 containers with a maximum Ø of 85 mm (Multistirrer 6), or up to 15 containers with a maximum Ø of 64 mm (Multistirrer 15) at the same time.

Magnetic Agitator Without Motor

ESP is an ultra-flat magnetic stirrer with no moving mechanical components and therefore maintenance-free.

illuminated-magnetic-agitator

Magnetic illuminated actuator, with 4 separately controlled positions.

How a magnetic stirrer works

The magnetic stirrer works with an electric motor to which magnets are attached. These set in motion an anchor immersed in the solution, which is itself a magnet. The reed, moving within the liquid, creates a vortex that keeps the whole solution moving. Thanks to this constant stirring, chemists achieve measurable reactions with the utmost precision.

Components

The components of a good magnetic stirrer are:

a box or container for all the elements that create the movement;
a motor that creates the movement, which could also be a fan;
the magnets attached to the motor, which must be of sufficient size to move those inside the liquid. The magnets must be opposite each other and with reversed polarity, i.e. mounted opposite each other;
The magnets must be of sufficient size to move the magnets inside the liquid.
the power supply for the motor;
the voltage management circuit, equipped with a potentiometer or adjustable voltage for speed control;
the ON-OFF button for activating the power supply;

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To carry out magnetic stirring, it is of course necessary to insert the magnetic stirring rod into the liquid. Magnetic stirring rods are magnets and must be coated with an insulating material, e.g. PTFE. If they were not insulated, the reeds could contaminate the solution by leaking their own substances, interfering with the processing to be carried out.

Magnetic stirrer

Container for magnetic stirrer

It is important to choose the correct container with which to agitate and in which to immerse the stirrer. Graduated beakers, or beakers, are most commonly used in the laboratory for the convenience of quantity reading and cleanliness. Plastic containers are sometimes used, but the friction with the stirring rod does not make them recommended. The plastic could be ruined, limiting the life of the beaker. For certain reactions, it is recommended to use capped containers, especially when stirring volatile substances. This avoids dispersing vapours into the environment, especially if they are to help keep the reaction going. In addition to the beaker, the Erlenmeyer flask is also widely used for stirring precisely because it is fitted with a stopper. Erlenmeyer flasks, due to their special shape, are also very stable for different types of stirring.

The choice of container, beaker or flask, depends on several factors:

power, a more powerful motor will make less effort and can agitate more liquid in larger containers;
the size of the stirring rod, which must be proportionate to the amount of solution to be stirred and therefore to the size of the container;
the viscosity of the liquid, which will require more power as the Pas, the unit of measurement of viscosity, increases;

The ideal magnetic stirrer

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A correct choice of all elements (motor power, container, stirring rod) such as the Velp, makes a vortex visible within the stirred liquid. The vortex must not hit the reel, otherwise the movement could create air bubbles, a phenomenon that must be kept under control. In almost all cases, no air bubbles should be present in the stirring, which can interfere with the creation of the mixture, especially when mixing creams or fluids.

Mixing viscous substances

The viscosity of a substance is metaphorically calculated as the speed it takes to move on an inclined plane from point A to point B. A very fluid substance will take a short time while a more viscous substance will take longer. In stirring, it is intuitive to understand how an increase in viscosity must be matched by an increase in stirring capacity. For stirring creams or dense mixtures, instruments capable of uniformly moving a mass of matter with a proportionate force must be used

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Showing all 16 results

Agitatore magnetico Multistirrer 15 -0

Agitatore magnetico Multistirrer 15

1

articolo

01VP0178

€ 957,00

Agitatore Magnetico Riscaldante Multiposizione AM4 Digital PRO

1

articolo

01VP1425

€ 2.260,00

Agitatore Magnetico Riscaldante Multiposizione AM4 Digital PRO Sistema

1

articolo

01VP1430

€ 2.570,00

Agitatore riscaldante AREX 5 Digital con sonda, asta e morsetto

1

articolo

01VP5020

€ 545,00

Agitatore riscaldante AREX 5 Digital con VTF

1

articolo

01VP5030

€ 694,00

Agitatore a vibrazione Vortex WIZARD -0

Agitatore a vibrazione Vortex WIZARD

1

articolo

01VP0180

€ 242,00

Agitatore a vibrazione Vortex CLASSIC -0

Agitatore a vibrazione Vortex CLASSIC

1

articolo

01VP0181

€ 207,00

Agitatore magnetico MICROSTIRRER -0

Agitatore magnetico MICROSTIRRER

1

articolo

01VP0161

€ 109,00

Agitatore magnetico senza motore ESP-0

Agitatore magnetico senza motore ESP

1

articolo

01VP0179

€ 193,00

Agitatore magnetico Multistirrer-0

Agitatore magnetico Multistirrer

4

articoli

01VP0177

A partire da:

€ 3,55

Agitatore magnetico illuminato AMI4 -0

Agitatore magnetico illuminato AMI4

1

articolo

01VP0185

€ 1.006,00

Agitatore magnetico riscaldante ARE 5

9

articoli

01VP6010

A partire da:

€ 24,50

Agitatori magnetici riscaldanti AREX 5

11

articoli

01VP6015

A partire da:

€ 24,50

Agitatore magnetico riscaldante AREX 5 Digital

1

articolo

01VP5010

€ 440,00

Agitatori magnetici riscaldanti AREX 5 Digital

15

articoli

01VP5010

A partire da:

€ 24,50

Agitatore Magnetico Riscaldante Multiposizione AM4 Digital

5

articoli

01VP1425

A partire da:

€ 24,50

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