Description
Hotplate with Magnetic Stirrer an ideal essential device for laboratories, is widely applied in colleges and universities, environment protection, research, sanitation, antilipidemic, petroleum, metallurgy, chemical, and medical units.
A magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic field to cause a stir bar (also called “flea”) immersed in a liquid to spin very quickly, thus stirring it. The rotating field may be created either by a rotating magnet or a set of stationary electromagnets, placed beneath the vessel with the liquid. Since glass does not affect a magnetic field appreciably (it is transparent to magnetism), and most chemical reactions take place in glass vessels (i.e. see beaker (glassware) or laboratory flasks), magnetic stir bars work well in glass vessels. On the other hand, the limited size of the bar means that magnetic stirrers can only be used for relatively small (under 4 liters) experiments. They also have difficulty dealing with viscous liquids or thick suspensions. For larger volumes or more viscous liquids, some sort of mechanical stirring is typically needed.
Specification of Hotplate with Magnetic Stirrer 78-1:
- Stirring capacity:1000ml
- Power Supply: AC 220V/110V 50Hz/60Hz
- Speed: 0-2400rpm
- Motor powers: 25W
- Heating power: 200W
- Temperature control range: Room temperature to 100 Celsius
- Timer: 0-120min
- Two-way rotation: Yes
- Easy to use, rich function configuration, cost-efficient.
A hotplate with a magnetic stirrer is a versatile piece of laboratory equipment that combines heating and stirring functions, making it ideal for various scientific and industrial applications. Here’s an overview of its features, uses, and benefits:
General Features of a Hotplate with Magnetic Stirrer
- Heating Element: The hotplate provides a consistent heat source for heating liquids or samples.
- Magnetic Stirring: Uses a rotating magnetic field to spin a stir bar (a small magnetic rod) placed in the container, ensuring uniform mixing.
- Temperature Control: Often equipped with adjustable temperature settings, allowing precise control over the heating process.
- Speed Control: Many models allow you to adjust the stirring speed to suit the viscosity of the solution being stirred.
- Safety Features: Some hotplates include features like over-temperature protection, automatic shut-off, and heat-resistant surfaces.
General Applications of a Hotplate with Magnetic Stirrer
- Chemistry: Ideal for mixing solutions, conducting reactions, or dissolving solids in liquids.
- Biology: Used for preparing culture media, incubating samples, or mixing biological reagents.
- Material Science: Employed in polymer solutions or other material preparations that require both heating and mixing.
- Pharmaceuticals: Commonly used in drug formulation and quality control processes.
Advantages
- Efficiency: Saves time by combining heating and stirring in one device.
- Uniform Mixing: Provides consistent mixing, which is essential for reactions requiring homogeneity.
- Space-saving: Reduces the need for separate heating and stirring equipment.
Limitations
- Limited Capacity: Depending on the model, there may be size limitations for the containers you can use.
- Heat Transfer: The heat transfer may not be uniform in larger volumes or dense solutions.
- Sensitivity: Some magnetic stirrers may struggle with very viscous liquids or solids.
Tips for Use
- Container Choice: Use appropriate containers that can withstand the heat and are compatible with magnetic stirring.
- Stir Bar Selection: Choose the right size and shape of stir bar for your specific application to ensure effective stirring.
- Monitoring: Regularly monitor the temperature and stirring speed to avoid overheating or ineffective mixing.
Maintenance
- Clean the surface regularly to prevent chemical buildup.
- Check the stir bar for wear and replace it as needed.
- Inspect the heating element for any signs of damage or wear.
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