Laboratory Magnetic Stirrer

November 1, 2021

In the field of laboratory instruments there are a number of equipment that are essential for procedures, research, analysis, among others in medicine and in areas such as science and technology. Scientists and researchers alike have used various tools to carry out countless studies, and the laboratory magnetic stirrer is one such piece of equipment.

If you operate within a laboratory, you will be able to see this tool continuously and as with many others, it will be necessary for you to know it so that you have a better performance when using it. Now, if you are one of those who like to obtain more knowledge, this instrument will be one of those that will awaken your thirst to learn more about this wide range of laboratory tools.

What is a Laboratory Magnetic Stirrer?

The Laboratory Magnetic Stirrer is an electronic instrument, it uses a magnetic field to mix one or more solutes with a solvent in an automated way. This equipment has the ability to heat chemical solutions, it also minimizes the risk of a solution being altered, since generally when the solutions are stirred manually they tend to become contaminated.

This electronic device is commonly used in food manufacturing and chemical research, but you will also find it in other research settings. You will see them in a variety of sizes, models or designed and manufactured for each content you want to shake, so you can choose the right one for your work from a wide variety.

What is a Laboratory Magnetic Stirrer for?

The Laboratory Shaker is used to mix liquids with each other or with powders , to produce solutions, fluid or viscous dispersions, as well as suspensions. This device is very useful in biology or chemistry laboratories, since these types of tools tend to be needed in order to carry out many mixtures.

Scientists prefer this type of equipment because they are silent , they do not break easily because they do not have moving parts that can break. They are also easily cleaned thanks to their small size.

This device serves to reduce the contamination of the reagents , normally when using motorized stirrers these need to be lubricated and for this reason there is a risk of contamination. This is why this magnetic stirrer tends to be the favorite of scientists in any research field.

It is important to note that there are models on the market of magnetic stirrers that serve to stir thick and viscous liquids, these have specialized magnets for this type of work, since not all have the facility to perform this action.

How does a Laboratory Magnetic Stirrer work?

Generally, this stirrer has an electric motor that allows it to rotate, this circular movement is exerted by a magnetic bar and is driven by magnets that are located in the lower part of the plate where the container that contains the liquid to be stirred is placed.

Keep in mind that the stir bars perform a better function in glass containers since they do not allow the magnetic field to be affected.

To maintain control of the engine revolutions, this equipment contains a microprocessed electronic instrument that easily regulates these revolutions. At the same time it guides the rotary rotation movement that adjusts the rotation speed depending on the mixture that is being produced.

The stirrer has a metal plate that is placed inside a beaker or a container with a flat bottom, where the liquid to be stirred is poured. Inside this metal plate the stirrer magnet must be located.

There are magnetic stirrers with revolutions between 100 and 1500, but with the advancement of technology, it is always possible to manufacture with higher speeds than those already mentioned, these have magnetic fields that control a magnet for the magnetic bar.

These bars are manufactured in various sizes, on which the agitation capacity depends. Manufacturers have come to build models that do not have a motor and that is why they are quieter and as they do not contain moving parts they do not cause friction.

In these cases, the motor has been changed for some electric coils , which are the cause of producing the electromagnetic field, this makes the stirrer magnet that has been submerged in the solution rotate, achieving the effect you need.

Uses of a Laboratory Magnetic Stirrer.

Regarding the uses of the Laboratory Magnetic Stirrer, you should know that they are usually used in chemistry and biology laboratories, to mix liquids or solutions. Depending on the model, you can stir viscous or low-viscosity solutions.

There are also magnetic stirrers that have a heating system, which are used for heating and this makes it more useful, because while the solutions are being made, they heat up simultaneously.

You can decide if you use it only as a heating plate or as a stirrer, when they are manufactured in this way they are known as a heating plate with a magnetic stirrer and sometimes as a heated magnetic stirrer.

When using the magnetic stirrer you must place the flask or beaker ready with the content of the solution that you are going to stir on the stirring plate, then insert the magnetic bar into the container and then turn on the device, adjust the speed .

Starting with the slowest speed to increase it progressively you will get the result you want. You must control that the liquid does not spill in the process and when the stirring is finished, remember to return the device to its initial speed and turn off the equipment, finally remove the stirring bar from the container.

Types of Laboratory Magnetic Stirrers

When talking about magnetic stirrers, you will find that they are classified into two large groups adapted to the needs of the experimental or investigative process that you are developing, this is how you will identify:

  • Magnetic stirrer motor

It is the one that has been specially manufactured to withstand long hours of work , over time the engine can be replaced and they tend to need spare parts that are usually cheap.

  • Multi-position Magnetic Stirrer

It is the one that has an option to shake several solutions at the same time , a different speed can be placed on each solution, its designs can be two, four, six or more numbers of positions.

This shaker is very important and useful in laboratories as it is efficient in production and can save space. They are cheaper since with a single agitator of this type you will not need to buy several agitators from a single position.

Characteristics of a Laboratory Magnetic Stirrer

The Magnetic Stirrer contains a small stirring bar , which is used to stir the mixture, this is inside a container that is placed on the stirrer plate, said bar is normally covered with Teflon or plastic, but covers are also available. of glass.

It has a circular frequency and its shape is elongated, the stir bars contain a flange that allows them to be supported when rotating, it contains a recuperator of magnets made up of a magnet that is embedded in the end of a long rod covered with Teflon that is used to remove the stir bar from the container.

It contains an electric motor in most cases which is what allows its magnets to rotate. Keep in mind that the stir bars are more functional when using small amounts of liquid and you must take care that it is not too viscous.

The size of the stir bars has a variant between 15 mm and 36 mm in length and 7 mm in thickness.

Magnetic laboratory stirrers are heated and resistant to temperatures as high as 300 ° C, and their characteristics make them easy to clean.

Importance of a Laboratory Magnetic Stirrer

Magnetic stirrers are of great importance in the area of ​​chemistry and biology, since they are used in procedures of great relevance for research and production of materials, food, among others.

The gear mechanisms of these devices tend to make them the most commercial due to their design and efficiency, their greatest contribution lies in the fact that they do not allow reagents to be contaminated, avoiding misuse of resources, they are silent and this helps to avoid sonic contamination in the environment, they are resistant and difficult to break, that is, they do not need constant replacement.

Being easy to clean and sterilize, they become a very useful tool in these fields where the time factor tends to be one of the most pressing. They are cheaper since they do not need to use lubricants and it is not necessary to hermetically seal the connection of the rotating mechanism that it has.

One aspect to highlight that includes it among the preferred among those of its class is that it is much easier to use than other types of agitators such as manual or motorized ones. It is safer to use and with quick results, reducing the time that normally should be used to mix a solution.

Familiarizing yourself with this tool will help you get the most out of using this very supportive kit by making it easier to shake up solutions and who says no, helping you save time that you will use to add more input to the world of research.

If you want to know more about this wonderful world of laboratory instruments enter my social networks.

Dr. Loony Davis5
 | Website

Born and raised in Brussels in an English family, I have always lived in a multicultural environment. After several work experiences in marketing and communication, I came to Smart Water Magazine, which I describe as the most exciting challenge of my career.
I am a person with great restlessness and curiosity to learn, discover what I do not know, as well as reinvent myself daily, someone who is curious about life and wants to know. I enjoy sharing knowledge.
This is my personal project but I also collaborate in other blogs, it is the case, the most important web on water currently exists in the US, if you are interested you can read my articles here.

Leave a Reply

Your email address will not be published. Required fields are marked *