Magnetic Stirrer – Definition, Principle, Types, Parts, Uses

What is Magnetic Stirrer?

• A magnetic stirrer, also known as a magnetic mixer, is a widely used laboratory device that revolutionized the process of stirring and mixing solutions. It operates on the principle of a rotating magnetic field generated by either a rotating magnet or stationary electromagnets, which causes a stir bar immersed in a liquid to spin rapidly, thereby facilitating the mixing process.
• The history of the magnetic stirrer dates back to 1917 when Richard Stringham of Utah received a patent for the first magnetic stirrer. Over time, magnetic stirrers have undergone significant improvements, and in modern devices, the magnets are typically rotated by an electric motor. These devices often incorporate a heating system, allowing for simultaneous heating and stirring of the liquid.
• Magnetic stirrers find applications in various fields, including chemistry, biology, academic research, business, agriculture, healthcare, and even homebrewing. They offer a convenient and efficient method for stirring small volumes of low viscosity liquids, where other traditional stirring methods such as overhead stirrers or stirring rods may not be suitable or practical.
• To ensure compatibility with the magnetic field, glass or other non-metallic beakers are commonly used in conjunction with magnetic stirrers. Stir bars, also known as fleas, are typically coated with materials like PTFE or glass to prevent any chemical reactions with the mixture being stirred. This coating ensures that the stir bar remains inert and does not contaminate the solution.
• One of the advantages of magnetic stirrers is the ease of cleaning and sterilization. Stir bars can be easily removed from the liquid, allowing for thorough cleaning and sterilization, unlike other stirring devices that may be more cumbersome to handle. This feature is particularly beneficial in laboratory settings where cleanliness and sterility are crucial.
• However, magnetic stirrers do have limitations. They are most effective with small experiments involving less viscous liquids. When it comes to larger volumes or suspensions with higher viscosities, magnetic stirrers may struggle to provide sufficient stirring power. In such cases, alternative stirring methods or specialized equipment may be more suitable.
• Overall, magnetic stirrers have become indispensable tools in many laboratories, offering convenience, efficiency, and versatility in stirring and mixing applications. Their continuous evolution and improvements have made them an integral part of scientific research and experimentation, contributing to advancements in various fields of study.

Definition of Magnetic Stirrer

A magnetic stirrer is a laboratory device that uses a rotating magnetic field to spin a stir bar immersed in a liquid, allowing for efficient mixing and stirring of solutions.

Magnetic Stirrer Principle

The principle behind a magnetic stirrer is based on the fundamental properties of magnetic fields, including the attraction between opposite charges and the repulsion between like charges. By harnessing these principles, a magnetic stirrer facilitates the stirring and mixing of solutions.

The magnetic stirrer consists of a micromotor that powers a magnet, which creates a rotating magnetic field. This magnetic field is responsible for spinning a stir bar or flea that is immersed in the liquid inside a vessel. The speed of the stirring can be adjusted according to the requirements of the experiment.

The rotating magnetic field generated by the magnet induces a rotational motion in the stir bar, causing it to spin rapidly within the liquid. This motion creates turbulence and facilitates the thorough mixing of the liquid, ensuring that all components are uniformly distributed.

In addition to the stirring function, many magnetic stirrers are equipped with a temperature control system. This system allows the stirrer to heat and regulate the temperature of the sample being stirred. By maintaining the desired temperature, the magnetic stirrer ensures that the mixed liquid meets the specific requirements of the experiment while keeping it at the necessary temperature for the desired reaction or process.

Overall, the magnetic stirrer principle relies on the manipulation of magnetic fields to induce rotational motion in a stir bar, enabling efficient mixing and stirring of solutions. The incorporation of temperature control further enhances its versatility and usefulness in various laboratory applications.

Types of Magnetic Stirrers

1. Mini Magnetic Stirrers

• Mini stirrers are compact, take up little space, operate quietly, and have low vibration, making them easy to use.
• It is resistant to dangerous and caustic laboratory chemicals.
• Additionally, you may regulate the speed so that it does not exceed the maximum speed.
• These miniature magnetic stirrers are utilised in laboratories and take up less space due to their diminutive size.
• The presence of corrosive chemicals in the laboratory has no effect on this stirrer.

2. Magnetic Stirrer with Timer

• This stirrer includes a built-in timer that allows us to control the established settings for a specific period of time, as its name suggests.
• The rotations are stopped automatically when the timeout expires.
• These stirrers are useful if you want the motor to switch off on its own.

3. Heavy Duty Magnetic Stirrer

• Heavy Duty Magnetic Stirrer is chemically resistant and has a high mixing capacity.
• A built-in electronic management system automatically regulates the speed in relation to the load.
• The Heavy Duty Magnetic Stirrer may be the ideal tool for both laboratory and industrial applications.
• With a great mixing capacity, these stirrers may be one of the best options for achieving satisfactory results.
• They are also chemically resistant and durable.

4. Battery operated Magnetic Stirrer

• When electricity is absent, battery-powered magnetic stirrers are perfect for use in the field, incubators, and other locations.
• They are also portable and lightweight.
• These magnetic stirrers are battery-operated and can be useful in areas with a weak or fluctuating power source.
• For purposes of stabilisation, rubber feet are provided.

5. Air Operated Turbine Magnetic Stirrer

• Air turbine magnetic stirrers employ low-pressure air to create magnetic stirrer rotations.
• Ideal for usage in environments with potentially dangerous solvent vapours.
• Air Operated Turbine Magnetic Stirrer is suitable for stirring up to 1 litre of solution.
• A low-pressure air supply is employed for its power.
• This stirrer eliminates the possibility of sparking associated with electrical sources.

Features of Magnetic Stirrer

Magnetic stirrers come with various features that contribute to their functionality and versatility. Here are some key features commonly found in magnetic stirrers:

1. Capacity: The capacity of a magnetic stirrer refers to the maximum volume of liquid it can accommodate for stirring. While the nominal capacity is usually higher, it is essential to consider the real capacity when choosing a magnetic stirrer. For example, micro models may have a nominal capacity of 3 liters, but their actual capacity for surfactant solutions may be around 1 liter, or roughly 250 ml for emulsions.
2. Maximum Speed: The maximum speed of a magnetic stirrer is measured in revolutions per minute (rpm). Most magnetic stirrers have a speed range of around 1000 rpm, allowing for efficient mixing. However, high-performance versions can achieve speeds of up to 2500 rpm, providing stronger stirring capabilities.
3. Maximum Permitted Temperature and Humidity: It is important to consider the maximum allowable operating temperature and humidity of a magnetic stirrer, especially when working in wet lab environments, tropical areas, or when dealing with hot materials. Checking these specifications ensures that the stirrer can handle the intended conditions without any issues.
4. Dimensions of the Mounting Surface: The size of the mounting surface of a magnetic stirrer determines the compatible beaker sizes that can be used with it. The surface area should be considered to ensure that the stirrer can accommodate the desired beaker size securely.
5. The Magnet: Magnetic stirrers utilize various magnet shapes and sizes, including rods and geometric shapes such as ellipses or discs. The size of the stirring rod magnet should be slightly smaller (typically 0.5-1.0 cm) than the diameter of the beaker to ensure compatibility. Different magnetic stir bars may be required for different beaker sizes to achieve optimal stirring performance.

These features contribute to the overall functionality and suitability of a magnetic stirrer for specific applications. Considering these features allows users to choose a magnetic stirrer that meets their requirements for capacity, speed, compatibility with beaker sizes, and operational conditions such as temperature and humidity.

Parts of a Magnetic Stirrer

A magnetic stirrer consists of several essential parts that work together to enable efficient stirring and mixing. Here are the key components found in a magnetic stirrer:

1. Top Plate/Hot Plate: The top plate, also known as the hot plate, is typically made of stainless steel or ceramic. Ceramic top plates are suitable for tasks requiring clear color vision, such as titrations, and they offer high chemical resistance for working with corrosive chemicals. Stainless steel top plates provide a strong coupling and stirring action without producing eddy currents like aluminum.
2. Stir Bar: The stir bar, also called a spin bar, is a small magnet coated with Teflon or another non-reactive material. Its main purpose is to stir solutions when placed in a liquid-filled container on top of a magnetic stirrer. The shape of the stir bar, such as octagonal or circular, depends on the vessel shape and the viscosity of the stirring media. Stir bars come in various dimensions, ranging from millimeters to centimeters.
3. Stationary Electromagnet: The stationary electromagnet is located inside the magnetic stirrer and generates a magnetic field. This magnetic field causes the stir bar to rotate when immersed in the liquid, creating a high-speed stirring action to homogenize the mixture.
4. Speed Controlling Knob: The speed controlling knob allows the user to adjust the rotating speed, measured in revolutions per minute (rpm), of the stir bar. The speed can be adjusted based on the density of the liquid or specific project requirements.
5. Temperature Controlling Knob: Many magnetic stirrers feature a temperature controlling knob. This knob enables the user to control and adjust the temperature of the liquid being stirred. The temperature control is dependent on factors such as the vessel size, viscosity of the liquid, and volume.
6. Stir Bar Retriever: While less commonly used in magnetic stirring, a stir bar retriever is a tool that consists of a magnet permanently embedded in a PTFE (Teflon) rod. It facilitates the safe and easy recovery of magnetic stir bars from irritant and corrosive liquid samples in glass flasks.

These components work together to provide efficient and controlled stirring and mixing capabilities in a magnetic stirrer, making it a versatile tool in various laboratory applications.

Magnetic Stirrer operating procedure

To operate a magnetic stirrer, follow these steps:

1. Prepare the liquid solution: Ensure that the desired liquid solution is already prepared and placed inside a suitable container or vessel.
2. Place the container on the hotplate: Position the container securely on the top plate or hotplate of the magnetic stirrer. Make sure it is centered and stable.
3. Connect to the mains: Plug the magnetic stirrer into a power source to supply electricity to the device.
4. Adjust the hotplate temperature: Press the temperature setting button or knob on the magnetic stirrer to adjust and set the desired temperature for heating the solution, if applicable. Follow the instructions provided with the specific model to set the temperature accurately.
5. Add the magnetic stir bar: Carefully place the magnetic stir bar into the liquid-filled vessel. Ensure that the stir bar is fully submerged in the solution and properly positioned for effective stirring.
6. Adjust the stirring speed: Use the magnetic stirrer speed adjustment button or knob to control the stirring speed of the magnetic stir bar. Rotate the adjustment knob clockwise to increase the speed, and counter-clockwise to decrease it. Adjust the speed according to the desired mixing intensity.
7. Stir the liquid mixture: Turn on the magnetic stirrer and allow it to stir the liquid mixture. Continue stirring until the desired uniformity is achieved, ensuring that all components are thoroughly mixed.
8. Remove the magnetic stirrer: Once the stirring process is complete, carefully lift and remove the magnetic stirrer from the container, ensuring not to spill or splash the liquid solution.
9. Disconnect from the mains: Safely disconnect the magnetic stirrer from the power source by unplugging it from the mains.
10. Handle the container: Use appropriate protective equipment, such as hot hands or heat-resistant gloves, to lift and handle the container, as it may be hot due to the operation of the magnetic stirrer.

Following these operating procedures ensures safe and efficient use of the magnetic stirrer while achieving the desired mixing and stirring results.

Magnetic Stirrer Calibration

Magnetic stirrer calibration is an important maintenance activity to ensure the accuracy and precision of the instrument. Here is a general procedure for calibrating a magnetic stirrer:

1. Use a calibrated thermometer: Start the calibration process by using a 300°C-calibrated thermometer. This ensures the accuracy of the temperature measurements during the calibration.
2. Place the sample-containing beaker: Position the beaker or flask containing the calibration sample in the center of the heating plate of the magnetic stirrer.
3. Activate the device: Press the ON button to activate the magnetic stirrer. In this calibration process, do not use a stir bar or magnetic stirrer.
4. Adjust the temperature: Turn the temperature knob or use the temperature control function to adjust the temperature setting on the magnetic stirrer.
5. Insert a calibrated thermometer: Insert the calibrated thermometer into one side of the beaker, ensuring that it is properly submerged in the calibration sample.
6. Record the temperatures: Take note of the temperature displayed on the control panel of the magnetic stirrer and also observe the temperature reading on the calibrated thermometer.
7. Repeat and observe: Repeat the process by adjusting the temperature setting on the magnetic stirrer and recording the displayed temperature and the temperature on the calibrated thermometer. Ensure to observe and compare the readings each time.

Maintenance of a magnetic stirrer

Proper maintenance of a magnetic stirrer is crucial to ensure its longevity and optimal performance. Here are some important maintenance practices to keep in mind:

1. Storage: Store the magnetic stirrer on a flat, dry, and clean surface to prevent any damage or contamination. Ensure that the storage area is free from excessive moisture or humidity.
2. Power connection: Before connecting the magnetic stirrer to a power source, ensure that the surface of the base is completely dry. This helps prevent any electrical hazards or damage to the instrument.
3. Cleaning: Avoid spraying cleaning solutions directly onto the magnetic stirrer to prevent corrosive damage. Instead, use a suitable cleaning solution, such as isopropyl alcohol or tension-containing water, and apply it to a clean cloth or sponge to wipe the surfaces of the stirrer.
4. Troubleshooting: If the stir bar is not stirring properly during mixing, reduce the speed or disconnect the power source. Check for any obstructions or issues that may be affecting the stirring action. Consult the user manual or contact the manufacturer for further troubleshooting guidance.
5. Operation duration: To prevent excessive vibration and potential damage during operation, it is recommended to limit continuous operation at medium speed to eight hours and high speed to four hours. Allow the magnetic stirrer to cool down before using it again for extended periods.
6. Grounding: Ensure that the instrument housing is correctly grounded to prevent any electrical accidents. Follow the grounding instructions provided by the manufacturer to maintain safety during operation.
7. Regular calibration: Regular calibration is essential for maintaining accuracy, particularly for temperature control. Follow the recommended calibration schedule provided by the manufacturer, paying special attention to temperature calibration. This helps ensure precise and reliable performance of the magnetic stirrer.

Precautions

When working with a magnetic stirrer, it is important to take certain precautions to ensure safety and maintain the longevity of the instrument. Here are some key precautions to keep in mind:

1. Grounding: Proper grounding of the instrument housing is essential to prevent electrical mishaps. Ensure that the magnetic stirrer is correctly grounded according to the manufacturer’s instructions.
2. Operation duration: To avoid excessive vibration and potential damage, it is recommended to limit continuous operation at medium speed to eight hours and high speed to four hours. Extended use beyond these time limits can lead to overheating and decreased lifespan of the instrument.
3. Maintenance: Keep the magnetic stirrer dry and clean at all times. Prevent any solution from entering the instrument as it can cause damage. When not in use, turn off the power to the stirrer and store it in a dry and ventilated area. Regular cleaning and maintenance will help prolong the life of the instrument.
4. Stirring heating time: Avoid prolonged heating while stirring. Excessive heating can put stress on the instrument and may lead to decreased performance or damage. It is recommended to use occasional heating cycles to extend the lifespan of the magnetic stirrer.
5. Troubleshooting: If the magnetic stirrer is not stirring properly or beating, slow down the speed or turn off the power. Check if the location of the stir bar is correct and ensure that the bottom of the beaker is flat. Addressing these issues can help prevent further problems and ensure proper operation.

Applications of Magnetic Stirrer

Magnetic stirrers have a wide range of applications across various scientific fields. Here are some common uses of magnetic stirrers:

1. Chemical experiments and synthesis: Magnetic stirrers are extensively used in chemistry laboratories to mix and stir various components during chemical experiments and synthesis. They provide efficient and uniform mixing, allowing for better reaction kinetics and ensuring homogeneous results.
2. Microbiology: In microbiology laboratories, magnetic stirrers are used to prepare culture media for growing microorganisms. They help in achieving even distribution of nutrients and additives, ensuring optimal conditions for microbial growth.
3. Sample preparation and analysis: Magnetic stirrers play a crucial role in preparing samples for analysis in both chemistry and biology experiments. They aid in dissolving and mixing reagents, ensuring that samples are properly prepared for subsequent analysis techniques such as spectroscopy, chromatography, and titration.
4. Extraction processes: Magnetic stirrers are employed in extraction processes, particularly in the extraction of plant materials. By continuously stirring the mixture of plant material and organic solvents, magnetic stirrers enhance extraction efficiency and reduce solvent consumption, leading to more efficient extraction of desired compounds.
5. Oil analysis: Magnetic stirrers are used in oil analysis laboratories to mix oil samples with various reagents or solvents for analysis. This facilitates the measurement of properties such as viscosity, density, and contaminants in the oil.
6. Other applications: Magnetic stirrers find applications in various other fields, including soil suspending, buffer solution preparation, pH measurement, and general mixing tasks. They are particularly useful when multiple liquids need to be blended to achieve uniform mixing and homogeneity.

Advantages of Magnetic Stirrer

Magnetic stirrers offer several advantages that make them a preferred choice in laboratory settings. Here are some key advantages of magnetic stirrers:

1. Temperature control: Magnetic stirrers allow for mixing reagents at a constant temperature. They can be equipped with a heating element, enabling simultaneous heating and stirring. This is particularly useful for experiments and processes that require precise temperature control.
2. Prevention of intense boiling: By utilizing magnetic stirring, the formation of intense boiling in a sealed container can be prevented. This helps maintain a controlled and stable environment during the mixing process.
3. Increased reaction rate and evaporation rate: The continuous stirring provided by magnetic stirrers enhances the reaction rate and increases the rate of evaporation. This is beneficial for processes that require efficient mixing and faster evaporation, leading to shorter reaction times.
4. Suitable for long-lasting procedures: Magnetic stirrers are well-suited for long-lasting procedures such as protein dialysis, where samples need to be continuously mixed for extended periods of time. The ability to run the stirrer for hours or even overnight ensures that the desired outcomes are achieved.
5. Minimal risk of contamination: With magnetic stirrers, only a small magnet bar, often coated with materials like PTFE or glass, is placed within the sample. This eliminates the risk of external moving parts coming into contact with the sample, reducing the chances of contamination.
6. Productivity, precision, and ease of use: Magnetic stirrers offer excellent productivity and precision in the laboratory. They are quiet, efficient, and straightforward to operate. Compared to electronic stirrers, magnetic stirrers are reliable, durable, and require minimal maintenance.
7. Capacity and speed control: Magnetic stirrers can handle larger volumes of liquids, with the capacity to mix up to one liter. They offer adjustable speed control, allowing users to set the rotation speed of the stir bar according to their specific requirements.
8. Durability and compact size: Magnetic stirrers have a compact design and occupy minimal space in the laboratory setup. Since there are no moving external parts, there is less risk of breakage or wear, ensuring a longer lifespan for the instrument.

Limitations of magnetic stirrer

While magnetic stirrers offer many advantages, they also have some limitations that should be considered. Here are some limitations of magnetic stirrers:

1. Ineffectiveness in dispersing nanoparticles: Magnetic stirrers are not effective for dispersing nanoparticles. For this purpose, sonication-coupled magnetic stirring is often used, where ultrasonic waves are applied in conjunction with magnetic stirring to achieve proper dispersion of nanotubes and other nanoparticles.
2. Difficulty with viscous liquids or thick suspensions: Magnetic stirrers struggle with stirring viscous liquids or thick suspensions. The rotation of the magnetic field may not provide enough force to adequately mix highly viscous substances. In such cases, alternative stirring methods, such as overhead stirrers or mechanical agitators, may be more suitable.
3. Limited capacity for larger experiments: Magnetic stirrers are generally suitable for relatively small experiments. The size of the stir bars limits the volume of liquid that can be effectively stirred. Typically, magnetic stirrers are recommended for experiments with volumes under 4 liters. For larger-scale experiments, alternative stirring methods may be required.

Magnetic Stirrer Examples and Buy Link

INTLLAB Magnetic Stirrer Stainless Steel Magnetic Mixer with stir bar

• This magnetic stirrer is ideal for stirring in scientific research, industry, agriculture, health and medicine, homebrew, etc. 
• It comes with one magnetic stir bars (7mm × 25mm). 
• The speed range is 0-3000 rpm. Maximum stirring volume: 3000 ml (0.8 gallons). Not suitable for highly viscous solutions. Glass beakers are not included.

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Slendor Magnetic Stirrer SH-2 Hot Plate Mixer Max 520℉ Lab Hotplate Stirrer 2000 RPM

• Adjustable Stirring Speed — There is a speed regulating device at the bottom of the SH-2 magnetic stirrer hot plate. Rotate clockwise to increase the stirring speed, and counterclockwise to decrease. Adjust as needed. The max stirring speed is up to 2000RPM.
• Rapid Heating — Heating Power: 180W, Max Temp: 520°F. The magnetic hotplate stirre can stirrer and heat at the same time. Included 1 inch Teflon coated magnetic stirrer bar and thermometer, which can be used to display the temperature during use.
• Advanced Material — The magnetic stir plate is made of advanced materials, resistant to high temperature, abrasion, and chemical corrosion. Each stir hot plate stirrer has been tested and inspected, and the quality is guaranteed.
• Widely Used — The magnetic heated plate is suitable for scientific research institutions, industry, agriculture, laboratories and universities. Tips: work continuously for 4 hours in high-speed state and 8 hours in medium-speed state.
• Quality Assurance — The professional magnetic hotplate stirrer has undergone strict quality inspection and can operate stably for long time. If you have any questions about the lab hot plate, please contact the seller customer service at any time.

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Apera Instruments AI2801 Powerful Magnetic Lab Stirrer

• An economical choice of a reliable and durable magnetic stirrer
• Ideal for home brew yeast starters
• Small, yet powerful stirring ability with a Max. 3000ml stirring capacity
• Smooth speed control (0-2300 rpm)

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SH-2 Magnetic Hot Plate Stirrer with 1 Inch Stir Bar Maximum Capacity 1000ml Max 380°C/716°F 2000RPM Stirrer with Dual Control

• 【High Quality Magnetic Stirrer】TAISITESMART SH-2 magnetic stirrer designed for professional lab, school, scientific research,medical,chemicals, industry and agriculture.The Hote plate is made high quality aluminum, chladni plate has a longer lifespan and is easy to clean.
• 【Fast Heating Plate】Excellent Stirrer Hotplate can be up to 380°C/716°F heating temperature, which is rapid heat conduction, uniform temperature distribution, anti-corrosion and durable.
• 【Integrated Stirring System】Magnetic hotplate stirrer with dual-control design can let you control the heating temps and stirring speed independently.
• 【Practical Lab Hotplate】The stirrer hotplate can be up to 380°C/716°F heating temperature, the speed range is 0-2000 rpm, maximum sample processing with 1000ml.
• 【Additional Accessories】The lab magnetic stirrer equipped with Teflon coating stirring rod, support bracket, adjustable thermometer bracket, extension length, support beaker test.

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Vision Scientific Digital Hotplate Magnetic Stirrer W Temperature Probe & Support Stand

• Provides excellent heating performance and efficient mixing
• Ceramic top plate with excellent corrosion resistance
• HOT warning prompted at temperatures over 50°C
• Continuous or timed operation
• Advanced microprocessor controls allow quick, precise adjustment of speed and temperature

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280℃/536°F 5 inch Digital Hotplate Magnetic Stirrer Hot Plate Ceramic Coated

• Accuracy and Fast Heating You can Trust: LED display for precise monitoring of speed and temperature in real-time. Ceramic coating provides excellent chemical resistant performance and most efficient heat transfer
• Powerful Stirring Performance: Max 5L stirring capacity and wide speed range 50-1500rpm satisfy different liquid’s density or project needs. Stirring and heating can function individually
• High Safety Equipment: Built-in PID controller ensures safe heating of the medium with overheating protection. Safety temperature of 50-320°C provides over-temperature protection. Enclosed heating plate design reduces the risk of liquid splashing into the equipment
• Long-lasting equipment: Brush DC motor is maintenance free and ensure long life time. This scientific hot plate can continually runs for 168 hours (7 days)
• Freedom from Error & 3 years warranty: Each lab magnetic hot plate stirrer is quality inspected, and can be easily contact with seller if any after-sale issues. Detailed instructions and precautions booklet provided in the package. 3 years warranty.

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Mini Stir Plate Magnetic Lab Stirrer with 3 Stir Bars, Magnetic Mixer 2000ml Adjustbable Speed 200-2000 RPM for Classroom

• 【EXCELLENT STIRRING CAPACITY】Lab Mini Magnetic Stirrer has a 200-2000RPM speed range, and the speed can be easily controlled by the knob.
• 【SMALL SIZE, LARGE CAPACITY】The magnetic stirrer’s maximum stirring capacity can reach up to 2L, Weighs only 460g and the machine size: 116mm*116mm*35mm(4.6inch*4.6inch*1.4inch), making it easy to carry and use.
• 【LAB QUALITY】The lab stirrer panel marks the center where the magnetic force can be strongest, designed to keep the stir bar firmly in place. The powerful and efficient motor is smooth operation and has long life.
• 【WIDELY USED】The mini lab mixer can be used for stirring low viscosity liquid or solid-liquid mixture. Ideal for the laboratory, classroom, workshop or home. The lab stirrer can also be used for beer brewing, wine making, wine decanter, home chemistry, and more.
• 【INCLUDED ACCESSORIES】Toolly mini magnetic mixer offers 3 stir bars to meet different mixing needs. And the power cable of the USB interface can also be connected to a laptop or a mobile power supply for use anytime.

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SH-3 Hot Plate Magnetic Stirrer 5000ml Volume with Dual Control and 1 Inch Stir Bar

• IMPROVE – On the basis of the SH-2, the machine size is enlarged, the motor stir power is increased from 10 watts to 20 watts, and the stirring capacity is increased to 5000ml.
• POWERFUL – Max.Stir Volume:5000ml, Speed:100～2000rpm stepless adjustable, Max.Temperature :380°C
• EASY USE – Dual controls Heating and stirring at the same time,1 inch magnetic stir bar is enough to stir a lot of liquid,ideal for stirring in scientific research, industry, agriculture, health and medicine, home brew, etc
• RELIABLE – This lab hotplate stirrer has obtained CE safety certification. Comes with complete accessories :Clamp,Standing Rods ,Fuse, US Plug, Power line ,Operational Manual and a Teflon-coated Stirring Bar ( 9mm Diameter 28mm length)
• NOVEL DESIGN – The silver-white panel matches the Green curved lines like a gentle moonshine that falls in love with a rough sea .Tell us to be passionate and focused at work, and have fun

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Fristaden Lab Magnetic Hot Plate Stirrer 280℃/536°F Max Temp 5L Capacity

• Maximum Heat & Capacity – This magnetic stir plate 536 degrees with a 5000ml fluid capacity. Includes a teflon-coated stirring bar, support stand, and PT1000 temperature sensor that reads out the liquid’s temperature in real time.
• Accurate Temperature – The LED display alternates between the temperature of the hot plate and the temperature of the liquid itself. Ceramic coated magnetic stirrer hot plate is corrosion resistant and cools fast.
• More Control – Two 3D knobs allow for both speed and temperature adjustment. Use it as a magnetic mixer, lab hotplate, or both.
• Versatile Uses – Your magnetic plate can be used in the laboratory, classroom, workshop or home for science projects, biodiesel making, home brewing, wine making, yeast mixing, aromatherapy, and more.
• Heat & Damage Resistant – Keeping your lab safe is important! The stainless steel top plate allows for immediate heat transfer for quick heat-up times. An added layer of ceramic coating makes the top plates both chemical-resistant and scratch-proof.

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Vision Scientific Digital Hotplate Magnetic Stirrer W Temperature Probe & Support Stand

• Provides excellent heating performance and efficient mixing
• Ceramic top plate with excellent corrosion resistance
• HOT warning prompted at temperatures over 50°C
• Continuous or timed operation
• Advanced microprocessor controls allow quick, precise adjustment of speed and temperature

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Heating Mantle Laboratory Thermostatic Heater with Magnetic Stirring Digital Temperature Control 2000ml

• 【Dual function】-With a temperature sensor, intelligent temperature control heating; with a magnetic stirring function, equipped with a stir bar, the solution can be mixed while heating.
• 【High quality】-High temperature resistant glass fiber is used as an insulating material, and the resistance wire of nickel-chromium material is sealed in the insulating layer and woven into the hemispherical internal heater.
• 【Excellent performance】-The magnetic stirring cover adopts stepless speed regulation operation, which can realize stable and precise stirring of the solution in a wide range of speed, especially in the experiment of small volume samples.
• 【Multi-purposes】-Ideal equipment for liquid heating and stirring in the fields of chemistry, environmental protection, biochemistry, experimental analysis, and education and research and development.
• 【Product background】 LAB FISH has passed ISO9001 quality system certification, all products can be used with confidence.

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Scilogex SCI280-Pro Circular-top Digital Magnetic Hotplate Stirrer w/Sensor and Stand, 5″ Dia. Ceramic Coated Steel Hot Plate, 280C Max

• Included: SCI280-Pro hotplate magnetic stirrer, PT-1000 thermometer/temperature sensor, integral sensor stand, and 50mm x 8mm magnetic stir bar. LED display shows temperature and speed. Brushless motor ensures smooth stirring control and longevity. Speed: 200-1500RPM, 3L Max Volume. All components are engineered and assembled for the highest build quality to provide years of service.
• Lab grade magnetic hotplate stirrer/lab mixer, can be used as an electric hot plate to heat only, stir only, or heat and stir together. Precise digital control for temperature and speed. Heats quickly, operates quietly, and has a small benchtop footprint to save space.
• Stainless steel hotplate is ceramic coated to promote rapid heat transfer, chemical resistance and easy cleaning. Heated magnetic stir plate has dual controls for temperature and speed. Provides “HOT” warning to conform to laboratory safety protocols.
• One of Scilogex’s most popular lab stirrers. Use this digital magnetic hotplate stirrer in the lab, school, or at home. Fast, accurate heating and mixing for science, education, research, or advanced hobbyists. Rare earth magnets provide a strong magnetic connection to the magnetic stir bar for excellent mixing of media.
• Scilogex is headquartered in the USA, providing premium lab equipment backed by excellent aftersales support and product service. You’ll find our equipment in commercial environments, research labs, and higher education – wherever high quality and precise control is required.

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Parco Scientific P1007-HS Digital Hotplate Magnetic Stirrer w/Ambient – 380°C Temperature Range, 6.5″ x 6.5″ Ceramic Coated Plate, LCD Display, and 2 Magnetic Stir Bars

• Motor type: Brushless motor
• Speed range [RPM]: 200-1500
• Speed and temperature LCD display
• Temperature display accuracy: 0.1°C
• Plate material: Material Ceramic coating surface/Stainless steel

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Scilogex SCI280-Pro Circular-top Digital Magnetic Hotplate Stirrer w/Sensor and Stand, 5″ Dia. Ceramic Coated Steel Hot Plate, 280C Max

• Included: SCI280-Pro hotplate magnetic stirrer, PT-1000 thermometer/temperature sensor, integral sensor stand, and 50mm x 8mm magnetic stir bar. LED display shows temperature and speed. Brushless motor ensures smooth stirring control and longevity. Speed: 200-1500RPM, 3L Max Volume. All components are engineered and assembled for the highest build quality to provide years of service.
• Lab grade magnetic hotplate stirrer/lab mixer, can be used as an electric hot plate to heat only, stir only, or heat and stir together. Precise digital control for temperature and speed. Heats quickly, operates quietly, and has a small benchtop footprint to save space.
• Stainless steel hotplate is ceramic coated to promote rapid heat transfer, chemical resistance and easy cleaning. Heated magnetic stir plate has dual controls for temperature and speed. Provides “HOT” warning to conform to laboratory safety protocols.
• One of Scilogex’s most popular lab stirrers. Use this digital magnetic hotplate stirrer in the lab, school, or at home. Fast, accurate heating and mixing for science, education, research, or advanced hobbyists. Rare earth magnets provide a strong magnetic connection to the magnetic stir bar for excellent mixing of media.
• Scilogex is headquartered in the USA, providing premium lab equipment backed by excellent aftersales support and product service. You’ll find our equipment in commercial environments, research labs, and higher education – wherever high quality and precise control is required.

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FAQ

References

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• https://www.pce-instruments.com/f/english/media/magnetic-stirrer-introduction.pdf
• http://impactfactor.org/PDF/IJPCR/9/IJPCR,Vol9,Issue9,Article2.pdf
• https://www.scienceequip.com.au/blogs/news/magnetic-stirrers-uses-types
• https://www.dwkltd.com/en/azlon-magnetic-stirrer-bar-retriever-ptfe-1
• https://www.kewlab.com/blog/post/magnetic-stirrer-working-principle-and-uses
• https://orgchemboulder.com/Technique/Equipment/Benchequip/Stirbar.shtml
• https://microbeonline.com/magnetic-stirrer-parts-principle-and-types/
• http://www.lanphan.com/lab-instruments/How-Does-a-Magnetic-Stirrer-Work-414.html
• https://camblab.info/a-guide-to-different-types-of-stirrers/
• https://www.kjmagnetics.com/blog.asp?p=stir-bars
• https://neuationcentrifuges.wordpress.com/tag/magnetic-stirrer-components/
• https://microbenotes.com/magnetic-stirrer-principle-parts-types-uses-examples/