Showing 1–20 of 199 results


  • The next step to your suitable item? The consultation with our team

Showing 1–20 of 199 results

What is a laboratory stirrer?

Lab meters are designed for use in the lab and also support certain process techniques. These include:

  • Homogenise

In homogenisation, the laboratory stirrer supports the dissolving of liquids into each other. By breaking up the components, even liquids that do not actually mix can be mixed uniformly.

  • Suspending

By stirring up solids that are not actually soluble in a liquid, the aim is to obtain a homogeneous mixture of liquid and finely and uniformly distributed solids.

  • Dispersing

In order to distribute gas uniformly in a liquid, the smallest possible gas bubbles or oxygen exchange surfaces must be created. This is achieved by controlling the intensity of the shear.

  • Emulsifying

The mixing of two immiscible liquids is also made possible by the laboratory stirrer. This prevents sedimentation by flow and at the same time makes it possible to determine the size of the droplets by means of intensity settings for turbulence and shear fields. In this way, the largest possible phase boundary is achieved.

  • Lsen

Certain soluble substances are to be dissolved in different liquids. The laboratory stirrer enables a uniform process.

  • Crystallising

During this process, the laboratory stirrer allows conclusions to be drawn about the crystal concentration of the media. For this laboratory requirement, the stirrer is also important in that the crystals must be conveyed as gently as possible, because shattered crystals do not produce the desired result.

  • Heating

A wide range of configuration settings enables laboratory stirrers to achieve optimum mixing results. It is also possible to heat media that are separated from each other.

In addition to research, laboratory stirrers are also used in quality control, for example.

Functions of a laboratory stirrer

When using a laboratory tube, not only can the above-mentioned procedures be carried out, but measurements can also be taken. For example, in some areas it is necessary to use instruments that have a torque measurement, as this represents a meaningful measurement signal. These are then referred to as gauges or torque gauges.

The measurement works in that the measurement signals can be used to draw conclusions about the viscosity of the media. However, it is important to note that other factors must also be taken into account: for example, factors such as filling level, temperature of the medium and the geometry of the tube play an important role in the measurement.

Construction of a laboratory tube

Laboratory tubes consist of a tube shaft with a tube blade and a tube drive with a clamping device for the tube shaft. These are located in a tube container in which a so-called flow breaker is also installed. The gearbox works from the outside and creates the flow at the bottom of the vessel by means of drive, by means of which the desired results are achieved.

Laboratory stirrers can be set differently depending on the area of application. For example, the number of revolutions of the drive is usually not regulated by steps, but can be regulated individually and continuously. Some laboratory stirrers work on an electrical basis: high-end instruments already have electronic speed control.

However, laboratory stirrers are not only there for mixing, but also support the heat transfer at so-called heat exchange surfaces.

Magnetic stirrers

Among laboratory stirrers, the magnetic stirrer is a particularly frequently used device. It is essential for

  • uniform stirring and mixing of media and
  • uniform heating of liquids and solutions.

Magnetic stirrers are particularly effective in biotechnological, microbiological, pharmaceutical, chemical or medical applications, with upside-down stirrers being ideal for biotechnology and analytical laboratories.

These allow liquids to be mixed in a closed vessel and are therefore used when liquids should not come into contact with the environment or when an inert gas atmosphere is required.

Laboratory stirrers: Types of stirrers

In the laboratory, a well adapted tube system is essential: only by using different types of tubes can optimum results be achieved in a wide range of media.

Propeller tubes

Propeller rotors are the right choice for stirring up solids. Blade rotors are particularly suitable for mixing medium to low viscosity liquids in the medium speed range.

Anchor drill

Anchor rotors are placed close to the wall and promote optimum heat transfer by generating tangential flow. They ensure uniform distribution of high mineral contents in medium to high viscosity fluids with low deposits on the vessel wall.

Cross-beam stirrer

Cross-bar agitators can be used to break up floating and sinking layers by means of shear flow. In this way, they ensure optimum mixing of the mostly medium-viscosity media.

Cross-blade stirrers

Shear blade rotors are inclined, almost always right-angled blades that generate axial and turbulent flow. They are mainly used for homogenising, suspending and dispersing media.

Lattice rotor

This is a frame construction or simply a blade tube with recesses. By means of tangential shear flow, a good heat exchange between medium-viscosity media takes place through the grid agitator.

Leaf agitator

The blade agitator is used when low speeds are required. The vertical blade produces a strong tangential shearing action and is often used in the laboratory mast.

Spiral or helical drill

Like the anchor drill, the helical drill is also placed close to the wall. It produces a powerful axial shear flow and is the right choice for highly viscous liquids, suspensions and pastes. It promotes homogenisation and heat exchange.

Impeller stirrer

The impeller agitator with radial flow provides really good mixing of media. This involves three impeller blades mounted close to the bottom and curved convexly in the direction of rotation , which are optimally suited for the suspension, homogenisation and heat exchange of media.

Disc agitator

For optimum dispersion and gassing, the disc agitator generates a strong radial flow. The circular disc with 6 vertical, outwardly arranged blades generates particularly strong shear forces.

Multi-stage impulse countercurrent stirrer

The MIG-shear produces a strong axial shear stress with medium or low viscosity media. It is used when optimum mixing is required.

Dissolve or toothed disc shear

The dissolver stirrer generates radial flow and provides extremely high shear by means of a disc with a serrated edge. It is therefore ideally suited for the comminution of particles.

Hollow Blade Drill

This is a circular disc with usually 6 vertical semi-circular bent blades. The hollow-blade agitator produces radial flow and strong shearing forces. It is used for gassing processes.

IKA Magnetic Drill

The high-quality IKA magnetic stirrers are used especially in laboratories and pharmacies and impress with their high-quality equipment. Among other things, they are equipped with

  • Lock mode,
  • Jog shuttle system,
  • digital and illuminated display,
  • gas or vacuum distributor,
  • temperature sensors,
  • soft-start motors,
  • strong magnetic field,
  • and much more.

At IKA, you also benefit from excellent customer service and a large selection of different laboratory tubes.

Heidolph magnetic stirrers

The particularly innovative magnetic stirrers from Heidolph support the work with media of different viscosities in your laboratory. Choose the ideal laboratory tube from our Heidolph range and benefit from features such as

  • Individual regulation of the stirring speed,
  • independent safety circuit,
  • PL (Product Liability) Insurance,
  • robust construction,
  • fast warm-up times,
  • microprocessor control,
  • and much more.

The manufacturer Heidolph also convinces with its many years of expertise, courteous customer service as well as reliable and durable products.

Further manufacturers of laboratory clocks at MedSolut

In addition to Heidolph and IKA, MedSolut.com carries other laboratory instruments from well-known and respected manufacturers. Find the right instrument for your daily use and let yourself be convinced by the high quality products from 2mag, SHIMADZU, witeg and many more:

2mag

2mag AG stands for outstanding developments and expertise in the manufacture of robust laboratory equipment. 2mag focuses on the needs of its customers and produces instruments that are optimally adapted to these requirements. Innovative concepts and many years of experience are the company’s recipe for success.

SHIMADZU

SHIMADZU is the manufacturer with a particularly broad product range for all requirements in the fields of life sciences, medical technology and instrumental analysis. Like all our manufacturers, SHIMADZU focuses on the highest quality and innovation.

witeg laboratory technology GmbH

The high quality of witeg products is already known in more than 100 countries. The company focuses on diversity and fulfils the most diverse customer requirements with DIN EN ISO 9001 certification as well ashigh-level engineering and expert knowledge.

The optimal labware for your requirements at MedSolut

Benefit from the wide selection of laboratory tubes in our range and the expertise of our friendly customer service. We can be reached at any time on +49 30 209 657900 or by e-mail ([email protected]). Our advisors will be happy to answer all your questions about the right laboratory tube for your needs. We look forward to your enquiry!