Overhead Stirrers

Powerful Stirring


Overhead Stirrer

Do you require an all-purpose stirrer that provides the best mixing results even for very challenging applications?

Advisor - Find the right device

Stirring media is one of the oldest process technologies. These include homogenization and suspending substances or emulsifying fats and oils, to name some of the most important areas of responsibility. Regardless of the task and the media used, the general goal is to achieve the best mixing result. This is achieved by configuring the perfect stirring system for the respective application.

Heidolph Instruments has been an important driver in laboratory technology for over 80 years. The very first laboratory equipment of the company was the overhead stirrer RZR: affectionately named after the founder's name 'Rudolf Zinsser Rührer'. Since then, the overhead stirrer series has evolved enormously and, with its state-of-the-art engine technology, is the basis of an optimal stirring system.

From the compact Hei-TORQUE Core with 40 Ncm torque to the intelligent Hei-TORQUE Ultimate models (available in 100, 200 and 400 Ncm), all Heidolph overhead stirrers are very easy to operate. Equipped with the so-called Quick Chuck (quick-action chuck), it is easy to change the stirrer - without the need for extra tools.

For the stirring of aqueous to highly viscous media, we also offer a large selection of stirring tools, including the innovative VISCO JET® blades. Depending on your application parameters, we can provide you with the right stirring tool. For an easy start, we provide you with the optimal vessel characteristics of each stirring tool in tabular form.

Convince yourself of the quality, performance and reliability of our overhead stirrers, which we develop and produce exclusively in Germany. And achieve perfect homogeneity with a complete system solution.


If you need further support in selecting the right system, please contact our specialists.

Application Support




Light weight, stirs powerfully up to 40 Ncm

Hei-TORQUE Expert 100

Powerful stirring up to 100 Ncm

Hei-TORQUE Expert 200

Powerful stirring up to 200 Ncm

Hei-TORQUE Expert 400

Powerful stirring up to 400 Ncm

Hei-TORQUE Ultimate 100

Powerful stirring up to 100 Ncm with full control

Hei-TORQUE Ultimate 200

Powerful stirring up to 200 Ncm with full control

Hei-TORQUE Ultimate 400

Powerful stirring up to 400 Ncm with full control

Overhead Stirrers - Packages

Hei-TORQUE Silver Package

Hei-TORQUE Gold 1 Package

Hei-TORQUE Gold 2 Package

Hei-TORQUE Platinum Package


Stirring Tools

Large selection for the optimal configuration

Overhead Stirrers - Accessories

Flex coupling

Flexible shaft

Shaft guard

Shaft guard adapter set

Stand S2 XXL

Telescope stand

Universal stand S2

Stirrer guide (NS 29/32 PTFE)

Beaker holder cpl. belt (incl. boss head)

RS 232 cable (9-pole)

Downloads & Video


Hei-TORQUE at a glance Download
Configuration tool Heidolph stirring system Download
Hei-TORQUE-Certificate-for-continuous-operation.pdf Download
CE-Ruhrwerke-Overhead-stirrer.pdf Download
GENTLE POWERHOUSES – Laboratory and Magnetic Stirrers Download



The technical data do not match exactly due to the various developments in the meantime. Nevertheless, comparable devices are staggered as follows ...

The tightening torque of the quick release chuck is individually adjustable ...

The Hei-TORQUE Expert models shows bars on the display, indicating changes in the torque or viscosity of the fluid.

The Hei-TORQUE Ultimate models show the actual torque in Ncm with one decimal place.

The numbering on the Hei-TORQUE models describes the respective torque of the overhead stirrer. For example ...

The Quick-Chuck is made of polyamide (PA) and thermally stable up to 115 ° C.