How to Use a Magnetic Stirrer

How a Magnetic Stirrer can help you:Magnetic Stirrer

What is uses of magnetic stirrer? If there is one device that is very useful in daily tasks and yet not in the forefront, it is the Magnetic Stirrer. A magnetic stirrer has the ability to perform all the relevant tasks in the background while you go about taking care of the more pressing and important matters. The magnetic stirrer is essentially a small bar magnet and a stand which contains a rotating magnet. The bar magnet is usually in a plastic cover and a stand or a place has the rotating magnet. Thus this setup helps creates a rotating magnetic field.

The Magnetic Stirrer has several applications and is actively used in many different industries. The main tasks it performs is to either stir or mix fluid samples. This is very useful in the food industry and chemical industry; besides which it is also used in several other industries like biotechnology.

Uses of a Magnetic Stirrer:

A magnetic stirrer is often also known as magnetic stir plates. Several firms and people who often conduct chemical and biological experiments find these magnetic stirrer. If you have a requirement where the sample components need to be mixed a magnetic stirrer is the device for you. It is possible to use either liquids or solids samples to obtain a homogeneous liquid mixture. For example, the bacterial growth media is a kind of sample used in with the magnetic stirrer.

How to use your Magnetic Stirrer:Magnetic Stirrer

The way the Magnetic Stirrer works that an external magnetic field is applied to the magnetic stirrer mix solution. This happens when the sample that you have placed in the stirrer starts rotating with the small bar magnet. The magnetic stirrer is a fairly small device and hence it is very easy to use in a laboratory.

Benefits of using a Magnetic Stirrer:

A magnetic stirrer plays important role in minimizing the risk of contamination since there is only an inert magnet bar that is placed inside the sample (fluid). It is very easy to keep this device clean. A manual stirrer is different from the magnetic one. The magnetic stirrer is vital for the process of reproducible mixing or mixing for long period of time. In the case where you require the process of protein dialysis to be performed on a sample, you will be required to place the sample in the stirrer for a very long time. In fact many laboratories prefer overnight sample mixing thus enabling them to utilize valuable time. This would be possible only with a Magnetic Stirrer and not the manual kind.

Practical Magnetic Stirrers at Neuation make the difference:

Neuation

There are many types of Magnetic Stirrer available like the heavy duty magnetic stirrer, the battery powered magnetic stirrer and even the air operated turbine magnetic stirrer. Each has unique characteristics and applications. Neuation is a company that design and develop their own high performance equipment with their highly skilled R & D team who make all the magic happen and constantly reinvent themselves.

The Complete Guide to Magnetic Stirrers and Their Components

It is quite common for a medical laboratory or a chemical laboratory to have a few instruments and devices to help them conduct their research or analysis. In fact, just about any laboratory, be it biological or academic is bound to have a large number of devices. Magnetic Stirrer is one device that is extremely useful and hence present in almost all laboratories. It is a vital device that is necessary for research work, product development and to aid in other analytical projects.

A magnetic stirrer is a fairly compact unit that can usually reside on a stable platform. It is mainly used to mix or stir fluid samples. It is popular amongst the chemical, food and biotech industries.

Components of a Magnetic Stirrer:

Components of a Magnetic Stirrer

The main components of a Magnetic Stirrer are as listed here:

  • Size
  • Heating element (hotplate)
  • Microprocessor Control Unit
  • Motor that helps drive the internal magnet
  • Timer

How it Works:

The way this works is by immersing a coated magnet in the sample container. The sample can be placed in a flat or round bottomed laboratory flask or some similar device. This is usually a bar magnet that is used in the flask, however the type of magnet largely depends on the size of the container being used. Hence there are other options beside using a bar magnet, like pellet, oval or egg. This container is then placed on a base that consists of an external magnet capable of being rotated with the help of a motor. Thus the stirring that occurs is as a result of the external and internal magnets and the rotation caused due to the motor.

Control Panel of the Magnetic Stirrer Control Panel:

The magnetic stirrer is a device that is very easy to operate, however the control panel of each model is slightly different. Here are several control options found on many Magnetic Stirrers:

  • Normal start and shut down
  • Heating plate controllers
  • Magnetic Motor controls
  • Temperature control
  • Motor RPM
  • Probe and Safety temperature
  • Ramp and Timer

Other useful features of a Magnetic Stirrer:

The magnetic stirrers that have a temperature probe, often have additional features like a safety shut down on high temperature as per the set options and temperature control for the hot plate. In addition to which the magnetic stirrers also have record keeping feature as well.

Neuation’s Magnetic Stirrer:

Neuation’s Magnetic Stirrer

Neuation is leading the way in the development of several laboratory equipment and devices. They are experts in developing new and innovative products to suite the requirements of people using such devices like the hot plate, a centrifuge, the magnetic stirrer and many more. These devices are often used in a laboratory and for educational purposes.

The benefit of choosing the Neuation devices to buy magnetic stirrer for your laboratory needs. Their devices are functionally and aesthetically sound. Since they develop several laboratory equipment and also have a research division, their devices are very efficient, fast, keeping with the technological changes and above safe to use.

Introduction to Magnetic Stirrer

Introduction to Magnetic Stirrer

A magnetic stirrer as the name suggests is a stirrer which makes use of a magnet. The basic concept of the Magnetic Stirrer is quite simple, in the sense that it is meant for the process of stirring. Although it is possible to stir manually it is not always feasible to do so considering that many processes especially those in a chemical laboratory are required to be stirred for an extended amount of time. In addition to which even home brewers make use of Magnetic stirrers not to mention it being used for research and medicine as well.

A magnetic stirrer has the ability to stir fluid fast, unattended and without even opening the container. Now that we know what is a magnetic stirrer, here is some more information on the device.

Magnetic Stir Bar

A magnetic stirrer makes use of a magnetic stir bar which is essentially a magnet that is encased. The way this works is that the magnet is immersed in the liquid that needs to be stirred. The encased magnet will not react with the liquid due to the material of the case. In addition to which the magnets itself are prepared in such a way that that they do not react with any liquid. This is often done by coating them in layer of Teflon (PTFE).

Working of the Magnetic Stirrer

The magnetic stirrer consists of two magnets. One of them is the magnetic stir bar as already described. There is another magnet used externally to generate a magnetic field with the magnetic stir bar that is immersed in the liquid.

These magnets are setup in such a way that the magnet inside the container is made to spin with the external magnet due to the magnetic field that is generated. The enternal magnet is usually associated with the stir plate underneath the container.

Neuation’s Innovative Magnetic Stirrers

Neuation offers Laboratory Digital Magnetic Stirrer

Neuation is leading the way in the development of several laboratory equipment and devices. They are experts in developing new and innovative products to suite the requirements of people using such devices like the hot plate, a centrifuge, the magnetic stirrer and many more. These devices are often used in a laboratory and for educational purposes.

The benefit of choosing the Neuation devices for your laboratory needs is that their devices are functionally and aesthetically sound. Since they develop several laboratory equipment and also have a research division, their devices are very efficient, fast, keeping with the technological changes and above safe to use.

A Brief Introduction to What Magnetic Stir Bar is All About

What is Stirrer? This is a simple enough question one might think. Since just about any device can be used as a stirrer. Although we usually associate stirring with some we generally do in the kitchen while cooking, this simple technique of stirring has several other applications as well.

For example, a chemical laboratory often requires to stir either a combination of chemicals or some chemicals in order to have the necessary effect or prepare them for further use. However, some of these chemicals need to be stirred for more than 8 to 10 hours hence it is not practical to do it manually. That is where magnetic stirrers come in which is effectively has the same concept but is not manual. Hence the real question here is actually “What is a Magnetic Stirrer?

Introduction to Magnetic Stirrer

A magnetic stir bar is a coated magnet that can be used for the purpose of stirring liquids. One of the main advantages being that the container of liquid does not have to be open in order to stir it and the container can even be completely sealed.

The most common application of a magnetic stirrer is in a chemical or biological laboratory for the purpose of research (often in the field of medicine). In addition to which enthusiasts often use it in their home brewers too.

Working of a Magnetic Stir bar

magnetic stir bar

The way the magnetic stir bar works is that a magnet is placed inside a container. This container will usually be filled with the fluid that is to be stirred. The second magnet is placed underneath the container since both the magnets need to work together. The magnet underneath the container will be attached with a motor. Thus when this magnet spins the one inside the container will also spin along with it. The distance between the two has to be set appropriately though.

The Neodymium magnetic stir bar

The stir bars are generally made using either ceramic or Alnico magnets. Ceramic magnets are common and comparatively inexpensive. On the other hand, ceramic magnets are the strongest kind of magnets available. The Neodymium magnets are very stronger magnets compared to the Ceramic magnets which have only 8 to 10% of the pull force.

The Neodymium magnets are also stronger than the Alnico magnets which are made from Aluminium, cobalt and nickel. They have about 25% the strength of a Neodymium magnet although they but are stronger than the Alnico magnets.

The Alnico magnets are often used for magnetic stirrers. The main advantage being that they can be used for high temperatures. However, the most popular one is the Neodymium magnet for a magnetic stirrer. The main reason for this is the coercivity. The coercivity of a magnet is how easily they demagnetise and become week. The Alnico magnets have a very low coercivity, while the Neodymium magnets have a high coercivity and in addition to that are also stronger than both Ceramic and Alnico magnets.

How strong are the magnets used in a Magnetic Stirrer?

Magnetic Stirrer

The maximum torque for a magnetic stir bar is the most relevant measure of strength for the magnet. The reason being that the greater the torque the greater the stirring ability.

However, there are several other factors that affect the strength of the magnet. These factors have been listed here:

  • The size and strength of a stir bar magnet is an important factor.
  • The bigger the magnet the stronger it will be.
  • A magnet that is big in size needs a bigger space. Since it is bigger it will push more liquid when placed inside the liquid container. Thus the speed at which it will turn depends on size of magnet and size of container too.
  • The strength also depends on the configuration of the magnets underneath the container. This can be 2 magnets at the end of the stir bar or simply as single long magnet.
  • The distance between the two magnets; the one underneath the container and the one inside also plays a crucial role.
  • The viscosity of the fluid plays an important role too.
  • The RPM (rotation speed) too is relevant.

How Neuation can help?

Neuation

Neuation is firm that supplies many different laboratory equipment. The magnetic stirrer is one of them. The magnetic stir bar from Neuation is coated with PTFE material that makes them more durable. There are several types of Magnetic stirrers available depending on the application.

What is a lab magnetic stirrer?

Screenshot_2

  • A lab magnetic stirrer is a device that is used in biological laboratories for example microbiology labs. Due to its characteristics, it is also known as a magnetic mixture.
  • The main task of a magnetic stirrer is to cause a stir bar absorbed in a liquid to spin quickly.
  • Biological laboratories and microbiological laboratories make use of magnetic mixer stirrer as it is small in size and easy to move it from one place to another.
  • Even, this device is easily cleansed and sterilized than any other laboratory equipment.
  • When it comes to comparing magnetic mixture to motorized stirrer, more often researchers prefer magnetic stirrer because of its features and quality usage.
  • Moreover, it saves lot of times because it gives result within no time. This helps researchers provide necessary details with proper information and analysis.
  • Though there are drawbacks of magnetic mixture, still lab technicians use it because of its authenticity and perfection in any report and research.
  • One of the negative aspects of this laboratory equipment is its limited size of stirring bar.
  • With its limitation, it can be used for small experiments comparing to some other lab devices. While for the larger volumes, other mechanical stirring devices are used in order to get expected results.
  • Apart from this, magnetic stirrer is mostly used in chemistry laboratories as it is light in weight and efficient in delivering diagnosis or reports.
  • Without any kind of lubrication, it works smoothly. And depending upon its usage, researchers or technicians can place it inside the closed vessels or systems and it doesn’t require any complicated rotary seals.
  • In some usages, it requires hot plates or other equipment for heating the liquid so that an authentic report can be generated without any inadequacy.
  • Thus, one can get maximum benefits out of magnetic stirrers or mixtures while using them in chemistry laboratory or microbiology laboratory.

An introduction to Magnetic Stirrer and brief information about the general assembly

The Magnetic Stirrer is commonly found in chemistry and biology laboratories since it serves a vital function that is required for several experiments and processes.

Magnetic Stirrer

This instrument is also referred to as magnetic stir plates; hence in case you were wondering “what is stirrer” you can rest assured it is the same as a magnetic stir plate.

Know that we know what is a stir plate, we can take a look at some more details about the device.

More in-depth look at what is a stirrer:

  • The main purpose of a magnetic stirrer is to mix several substances, either solids or liquids which results into a homogeneous liquid mixture.
  • Some of the practical uses include bacterial growth and also buffer solutions.
  • The magnetic stirrers work in a unique method using an external magnetic field. This external magnetic field rotates the small magnetic bar that needs to be placed inside the mixture. This causes the rotation to occur.
  • One the main advantages of using a magnetic stirrer is that there is almost no risk of contamination occurring.
  • There are several substances that require to be mixed for considerable amount of time like 5 to 10 hours. It is hard to achieve such a feat of consistent speed and good stirring for so long on a manual stirrer.
  • A magnetic stirrer can be setup with the necessary substances to mix and allowed to run unattended. This means that the long mixing process can even be done overnight (which saves time) and is more efficient.

Brief introduction into the assembly of a Magnetic Stirrer:

Magnetic Stirrer

  • The first step is motor assembly which involves using a motor, a hardboard and the magnet. The magnet is attached to the motor with the help of a hardboard.
  • The motor needs to be put in place in the right manner using the right screws and frame since it is vital that it remains in place when operational.
  • The second module is the speed control of the motor. The circuit for this is available and can be prepared on a PCB along with the necessary components.
  • Next comes the installing the battery and the LED.
  • Then comes the final assembly that include putting all together.

Neuation has the perfect magnetic stirrer for you:

Neuation has the perfect magnetic stirrer

Neuation offers several laboratory equipment including the magnetic stirrer. They produce several types of magnetic stirrers including the magnetic stir bar. Their stirrers are PTFE coated for added protection.

Neuation offer only the best products. They are an ISO 9001: 2008 company hence their products are of high quality. In addition to which the management system is ISO 13485: 2003 (certified lab equipment manufacturer). All their products are consistently good and of international quality.

The main advantage of choosing Neuation is that they also have an R&D division that performs a lot of research and continuous upgrades to their devices.

Gaining Deeper Knowledge About the Magnetic Stirrer

Understanding Magnetic Stirrers Components & Control Panel:

There are many applications for the magnetic stirrer. In fact many of us are already familiar with the concept with manual stirrers. However the magnetic stirrer open so many more doors in terms of usefulness and functionality that makes them vital in daily use. This is one of the reasons why magnetic stirrers are commonly found in chemical and biological laboratories.

Components of a Magnetic Stirrer

This article make understanding the magnetic stirrer very easy by describing in detail the various components of a magnetic stirrer, the role of several elements and brief introduction to how the control panel can be operated.

Components of a Magnetic Stirrer:

Magnetic stirrers are usually microprocessor controlled and available in several sizes too. However the general principal behind the device remains the same as do the Magnetic Stirrer Components. The main components of a magnetic stirrer include:

  • Microprocessor control unit
  • A motor (this drives the internal magnet)
  • A hotplate (this heats the sample)
  • A probe (this monitors the temperature)

A conventional magnetic stirrer consists of a flat or round bottomed laboratory flask and an immersed magnet which can be either bar, oval, pellet or egg shaped. This essentially depends on the size of the container.

The way this works is when the magnetic stirrer is activated the base magnet effectively rotates the container using the magnet present in the container.

It is important to note that though this process requires that a magnet be immersed into the container with the sample, it is completely harmless and does not contaminate the solution.

On the other hand there is also a downside to using a magnetic stirrer. When it comes to highly viscous liquids the magnetic stirrer may not be of any use. Although it is important to note that the magnetic stirrer have an adjustable speed setting and range from 50 to 1600 rpm.

Functionality of the temperature probe:

The temperature probe is used for monitoring the temperature as the name suggests, however it does have several other functions as well. The temperature probes are connected to the microprocessor hence they can be directly operated via the main control panel of the magnetic stirrer. Thus the temperature can also be monitored on the control panel.

Besides monitoring the temperature the temperature probe doubles as a safety device. Thus when the there is a temperature drop and it is not in safe range an automatic shutdown of device is initiated.

Magnetic Stirrer Control Panel:

Each magnetic stirrer will have a control panel however the control panel itself may differ from brand to brand. There are several important functions that are controlled with the help of a control panel as mentioned below:

  • Powering the device.
  • Controlling the heating function.
  • Controlling the magnetic motor.
  • Control of the motor RPM.
  • Maintaining the right temperature level.
  • Timer operation.

Neuation has the perfect magnetic stirrer for you:Neuation Technologies

Neuation offers several laboratory equipment including the magnetic stirrer. They produce several types of magnetic stirrers including the magnetic stir bar. Their stirrers are PTFE coated for added protection.

Neuation offer only the best products. They are an ISO 9001:2008 company hence their products are of high quality. In addition to which the management system is ISO 13485: 2003 (certified lab equipment manufacturer). All their products are consistently good and of international quality.

The main advantage of choosing Neuation is that they also have an R&D division that performs a lot of research and continuous upgrades to their devices.