Magnetic stirrer is a must for those who like to do various chemical experiments. With the help of this device, various ideas can be translated into reality not only in the laboratory, but also in the home. In order not to spend personal savings, you can build a magnetic stirrer with your own hands in just a few hours. As the main parts, you can use an unnecessary printer and CD-ROM. To make the design multifunctional, you need to prepare an old CRT monitor.
Description
Many craftsmen prefer to make a magnetic stirrer with their own hands. Such a unit is simply indispensable in cases where you need to evenly mix, homogenize or simply dissolve several liquid media without preheating. Magnetic stirrers are widely used in medical, pharmaceutical, biochemical, diagnostic and microbiological laboratories.
All these industries are focused on working with living,sensitive, easily degradable samples that must not be contaminated. If you make a magnetic stirrer with your own hands from high-quality inert polymers and composites, then in the end you can get a high-quality device that will have a small area of \u200b\u200bcontact with the mixture.
It is worth noting that some factory models allow you to easily mix a 10-liter bucket of water. And this means that the mixer will perfectly cope with 5 liters of viscous liquid. The efficiency of the device is due to the presence of a non-wearing magnetic head.
Required tools
To make a magnetic stirrer with your own hands, you need to prepare all the necessary materials and fixtures in advance:
- pliers;
- multimeter;
- cutters;
- drill and drill bits;
- screwdrivers;
- 12V power supply;
- wires;
- neodymium magnet (can be taken from an old hard drive);
- fuses;
- solder and soldering iron;
- adjustable wrench;
- anchor for stirring;
- plugs and connectors;
- PC fan;
- switch;
- rubber feet (will prevent the unit from slipping);
- superglue;
- plastic container.
It is worth noting that you can make a magnetic stirrer with your own hands if the master is familiar with the basics of electrical engineering and soldering. The final result depends on the skills of the performer.
Workersnuances
To make a magnetic stirrer with your own hands, you first need to create an electrical power circuit for the future unit. In order to avoid the most common mistakes, you must use the classic scheme. After high-quality soldering of the circuit, the potentiometer should be adjusted to the specified parameters. Only after that you can start installing the magnets in the body of the laboratory stirrer. To do this, you need to drill a small hole in the center of the aluminum circle. Neodymium magnets are attached to the sides, and a pulley from the motor is mounted.
The next step is to assemble all the parts into a single design. For fixing, you can use ordinary bolts. In order for the container to be securely held in one place during shaking, a small magnet must be attached to the bottom. The product must not react with acids or other reagents. At the final stage, testing of the unit is mandatory. It is worth noting that the choice of an anchor for a magnetic stirrer should be approached as responsibly as possible. With your own hands, you can make a high-quality and durable product.
Assembly rules
You can make a magnetic stirrer from improvised materials in just 1-2 hours. The first step is to connect two magnets to the cooler. They must be parallel to each other so that the poles are opposite. It is necessary to use glue, but if it is not available, then regular tape will do. Since the fan will become higher due to the magnets, you need to level the height of the platform. Suitable for workclassic cooler bolts.
A plastic disc case is ideal as the main surface, and an insulated iron paperclip as a stirrer. After that, you can turn on the magnetic stirrer. Only two wires are needed for power supply. Dishes for liquid must be flat. When the water is filled, you need to install a paper clip.
Expert Tips
If the work of the laboratory is aimed at in-line analysis using sensitive samples, growing or dissolving various microorganisms in nutrient media, then you need to think about the invention of a universal multi-place magnetic stirrer with preheating. Such units can be purchased in specialized stores, but their cost is quite high.
Large research laboratories and centers that are engaged in the release of brand new products need to purchase a multifunctional overhead stirrer with various nozzles. It is impossible to do without a powerful plant in the process of making sugar syrup, creams, gels and even cement mortar.
