VELP tips for choosing the best mixer for your lab
Mixer applications and laboratory equipment solutions provided by VELP
Some applications in the laboratory require stirring, and there are many different types of laboratory equipment available to perform stirring and mixing tasks.
Sample and solution preparation, water/oil bath preparation, dissolving buffers and reagents, dispersion, emulsification, homogenization.
These are just some of the applications supported by a wide range of mixers for laboratories in the food and beverage, cosmetic, pharmaceutical, chemical, paints and coatings, glues and adhesives, plastics/polymers and construction industries.
Which one is right for your application and lab?
Variables Involved in Selecting Proper Mixing Equipment
Viscosity
Viscosity is a measure of a fluid's resistance to flow or shape change due to internal friction between molecules. It is related to the stirring medium. Samples like water can be stirred perfectly with a magnetic stirrer, while high viscosity mixing requires the use of a DC stirrer. This is especially true for applications where the viscosity of the sample increases with stirring, such as emulsions or polymerization reactions. The more viscous the sample to be stirred, the greater the torque required. When choosing the right DC mixer, viscosity and torque specifications are critical.
Volume
Magnetic stirrers are ideal for stirring water-like volumes, up to 20 liters in standard desktop models and up to 50 liters in higher volumes. The DC mixer can mix up to 100 liters.
Speed
Magnetic stirrers are available in speeds from 30rpm to 1700rpm to support challenging chemical and pharmaceutical applications. However, the highest speed may sometimes result in decoupling and unsatisfactory mixing performance. When very low or very high speeds are required to stir samples, DC stirrers offer more options as their speed settings range from 6 to 2000 rpm.
Temperature
Some models of magnetic stirrers have a heating plate that heats the sample during the mixing process. DC mixers require separate equipment for heating.
Application-based approach: the best mixing solution for your needs
Magnetic stirrers and heated stirrers perform low-shear mixing tasks and rely on the vortex generated by the magnetic rotor to mix liquids, while DC stirrers are available with a variety of stirring shafts to support low-shear and high-shear mixing and Different mixing movements, with or without vortices.
This means that applications involving vigorous mixing of emulsions and stirring of medium to high viscosity materials such as polymers can be well supported by DC mixers. This equipment is suitable for replicating the conditions of production mixes to test samples for larger production scale.
Magnetic stirrers and heated magnetic stirrers are commonly used in laboratories to perform applications that require precise and continuous control of medium temperature and stirring speed.
For example, heated stirrers are the best solution for oil bath and chemical synthesis applications. Measuring temperature within the sample through the probe increases control of the reaction, ensuring the device provides heating when necessary and avoids overheating. The hemispherical bowl increases the surface of the round bottom flask and improves heat transfer efficiency.
Accessories allow you to customize your mixing equipment for different tasks and applications, making it unique.
Large capacity magnetic stirrers are designed for low viscosity laboratory stirring applications, particularly in the pharmaceutical industry.
high volume formulation
Preparation of buffer solutions
Buffer preparation and WFI (water for injection), especially in the downstream sector
vaccine manufacturing
Magnetic stirrers are typically used to mix vials of liquid, test reagents or experimental samples and diluents, utilizing the orbital motion of rubber cups.
More product information: https://www.te-lab-equipment.com.tw/velp.htm