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.

Advertisements

Hot Plates – The Essential Laboratory Equipment

What are hotplates?What are hotplates?

A hotplate is a highly portable device that can have up to two gas burners. There are two sizes of hotplates available though. One is the single burner and the bigger one and the other is the double burner one. There are two types of burners available too and it can also be a heating element (electric too) for some. The portable one is small enough to be used on the table top as a standalone device. The main feature of hot plate is that it does not require any other resource except electricity to operate.

What is a hot plate used for in the lab?The hot plate is a vital device that is used in a laboratory to heat samples

The hot plate is a vital device that is used in a laboratory to heat samples. The fact that it has the ability to heat the sample without any exposed flames is one of the major advantages. It is a device that can be used on a daily basis for temperatures as high as 100 degrees and even higher.

It is important to check material of the hot plate surface. There is a big advantage of using a flat plate however the hot plate can be made from several materials like ceramic, aluminium or enamel. An aluminium heating plate can distribute the heat evenly and that too quite fast and efficiently. It is a device that is easy to clean and maintain as well. Although care must be taken against corrosion.

The other materials used to make a hot plate are ceramic and enamel. These too have their own unique characteristics. They are both considered to be more durable in terms to handling temperature as well as strong chemicals. These plate can resist higher temperature and are also sensitive to color change. Hence the color change due while heating of plate is more noticeable.

Neuation has the perfect hot plate for you:

Neuation hot plate magnetic stirrer

Neuation offers several laboratory equipment including hot plates. They produce several types of magnetic stirrers including the hot plate magnetic stirrer. 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.

Centrifuge Cleaning Tips to Ensure An Efficient Centrifuge

A centrifuge device is quite in many laboratories. In fact, most of the hospitals and other chemical & biological laboratories cannot do without one. This is device has many applications and high usage. The way the device works is that it spins the sample which is likely to be a fluid sample at high speeds. It often happens that there are spills and hence it is necessary to make sure that the device is kept clean. In addition to which the centrifuge is also used for toxic samples hence this makes it more important that the centrifuge is clear of any foreign particles. Thus centrifuge cleaning is important and here are a few tips to help with the centrifuge cleaning procedure.

Maintenance tips for Centrifuge device:

  • The outside of the centrifuge can be cleaned with a soft cloth and should be done gently. It is permissible to use mild soap or even a commercial soap product along with water to wipe it clean.
  • It is recommended one uses a domestic cleaner with pH 6 or pH 8 for the general cleaning of the lid and case as well as control panel of the centrifuge.
  • The inside of a centrifuge is not always manufactured from the same material. The material used inside the centrifuge can either be plastic, ceramic, aluminium or stainless steel. Hence while bleach may be good for one of the surfaces it is not good for stainless steel surface. Hence the safest way to ensure the inside of the centrifuge is kept clean is to check the manual for the centrifuge which should clearly state what to use.
  • In case a radioactive sample has been used, it is possible to use a solution with 70% ethanol and 10% sodium dodecyl sulphate in water. The parts can be rinsed in ethanol first and then de-ionized with water.
  • Some of the centrifuges make the job of maintenance easier. This is because some centrifuge devices have a system called ‘Clean in place’ (CIP). This system can effectively the parts of the centrifuge automatically.
  • The build of moisture inside the centrifuge should be prevented by taking proper steps and cleaning or wiping are regular intervals.
  • Some of the centrifuge devices have a vacuum system. This system is often found on the high speed centrifuge devices. Such devices will always have a rubber seal too. To ensure proper operation, it is vital that these rubber seals are kept clean.
  • Besides which there are other centrifuges devices which also have fans and refrigeration. Such device are likely to have an air filter. It is vital the air filter on such devices be kept clean.

Important factors to be aware off during maintenance of centrifuge:

  • A centrifuge device can have a temperature feature and hence it would have an optical sensor or a temperature sensor within the bowl. These sensors can be very sensitive and hence utmost care is required while cleaning them.
  • For a centrifuge that spins at a very high speed it is very important that it be placed on a level surface. Furthermore, the centrifuge device is likely to have stoppers underneath which can come lose or detached while cleaning. It is thus important to ensure that they are firmly fitted after completing the maintenance procedure.

Scheduling Maintenance & getting professional help:

It is a good idea to schedule the regular maintenance of your centrifuge device. This way you can be sure that the device ready to use when you need it.

The maintenance is something that can either be done by yourself or by taking help of the professionals. However, there are some situations in which you should always take help from the professionals as listed here.

  • In case of unusual sounds like knocking or scraping or grinding noise it is a good idea to call in the professionals for a closer inspection of the device.
  • The centrifuge devices can be quite sensitive. Hence in case of a spill or a leak it is at times hard to remove the spilled sample. In such cases it is also a good idea to call in the professionals.

Neuation’s Centrifuge Devices

Neuation’s Centrifuge Devices

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 with magnetic stirrer, 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.

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.

What is a Hotplate Magnetic Stirrer and how it’s Works?

Information about what a Hotplate Magnetic Stirrer is and how it’s work:

A Hotplate Magnetic Stirrer which is more of like an electric burner is mostly used for cooking purposes in kitchen or other places like hostels, motels etc. but the same is also very much appropriate for scientific tryouts in laboratories like multi position hotplate stirrer. Hotplate Magnetic Stirrer

Hotplate mechanics:

The mechanism used is quite simple to explain in traditional electric hotplates. When the device is connected to a socket via electric plug, the coils fitted within the plate gets heated and serves the purpose. Now days instead of the traditional heating methods, halogen heating is the new technique used which heats way quicker than the old ones. Moreover induction hotplates are also in very much demand because of the greater safety they provide during processes.

Formation of hotplates:

The main portion of the electric hotplate i.e. the plate is made of heavy metals like cast iron or ceramic. Remainder body part is made of either steel or plastic. The no. of burners depends on the type of hotplate but mostly they have one or two burners along with multiple knobs for various settings like temperature or heat warning.

Hotplate’s specialties:

  • Quite inexpensive in nature as compared to other devices
  • Portable
  • Easy to use
  • Occupies smaller space

Type of hotplates:

Generally there are two common types of hotplates:

1) Electric Hotplate: uses Aluminum/ceramic/Enamel/iron surface or coils which gets heated when electricity flows. There are pros and cons attached to all types of surfaces. These hotplates are although cheap in cost but risky and surface remains hot for quite a long time

2) Induction Hotplate: This uses the magnetic induction heating technique by creating a magnetic field to heat the vessel. They are costly but quite safe and time taken to cool down the surface is also quite less.

Uses at Laboratories for Scientific Researches:Uses at Laboratories for Scientific Researches

Generally hotplates are used at laboratories to heat glassware & its contents, to uniformly heat samples and for preparing scientifically used chemicals. The drawbacks of Bunsen burners i.e. open flame etc. are avoided by the use of these hotplates.

In present times Magnetic stirrer hotplate are also available which allows the automatic stirring of the liquid getting heated on the hotplate. Multiple position hotplate stirrers are also available for time saving and fast operations which contains multiple hotplates that are separately controlled.

Best hotplates & other Laboratory equipment:

Neuation Technologies

Neuation Technologies is in one of such companies that manufacture the best laboratory equipment including best hotplates. The products like Micro Centrifuges, Stirrers, Shakers, Vortex mixers, Mini Vortex mixers, Clinical centrifuges, Laboratory centrifuges, Digital tube roller etc. offered by this ISO certified company are not only of high quality but are of latest technology as well. If you are searching for the best supplier for laboratory equipment you can get in touch with Neuation Technologies, visit neuation.com for more details.

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.