The measure of all things

Precision and innovation for complex technical processes: the Chronos scale

Modern weighing technology as we know it today was hardly conceivable in the past. It was not until 1883 that two pioneers from Hennef, Carl Reuther and Eduard Reisert, invented the world's first fully automatic legal-for-trade scale - the so-called Chronos scale.

Mr. Opdenhoff: Contact person for mixer systems

Book your free, no-obligation personal consultation with Jürgen Opdenhoff for weighing scales now.

On the trail of modern weighing technology:

the Chronos balance

Arrow to the right

A special start

The history of these scales is closely linked to the history of the town of Hennef - no wonder, as the two inventors were real Hennef residents themselves. In April 1883, the Chronos scales were approved for calibration by the "Kaiserliche Normal-Aichungs-Kommission" in Berlin. This was the first time in the world that an automatic weighing instrument was recognized as a standard - a special moment in the development of German craftsmanship and an invention that was to change the world.

Arrow to the right

A look into the past

For the first time, it was no longer only possible to weigh goods manually: The Chronos scale made it possible to weigh bulk goods automatically and with pinpoint accuracy. Although scales have been the measure of all things since their creation, it is still unclear exactly where they were developed in prehistoric times. Their origins go back to the oldest cultures of mankind.

Arrow to the right

From the bar scale to the decimal scale

The oldest equal-armed beam scale dates back to around 5,000 BC and was discovered in Egypt. The development of these scales and all their successors, such as the decimal scales from the 19th century, were to be trendsetters for the way goods were weighed and for the binary number system as we know it today.

Arrow to the right

One scale, many weighing options

Eduard Reisert's idea of an automatically operating throughput measuring device for loose bulk materials and Carl Reuther's expertise in the construction of scales ultimately led to the birth of the company C. Reuther & Reisert, also known as Chronos-Werke, in 1881 and subsequently to the development and legal recognition of the Chronos scales. It also gave rise to many different types for the various properties of weighed goods.

Arrow to the right

Efficient and time-saving

Since this pioneering invention, loose bulk goods such as flour, coffee or salts have been automatically weighed and filled to their destination. In many places, this saves a significant amount of time, makes the process more efficient and involves less work - three of many reasons that explain why the weigher became so successful and has had such a huge impact on the way weighing is still done in industry today

Arrow to the right

On the road along historical paths

The special achievements of the two pioneers Reuther and Reisert are commemorated, among other things, by a scales trail through the center of Hennef with 22 information boards at historical sites and places where the two inventors worked. Guided walks give interested visitors an insight into the history of the Chronos scales.

Arrow to the right

Permanent exhibition in Hennef

Interested visitors can also view the scales in the display window at Hennef railroad station, in the Carl-Reuther vocational college of the Rhein-Sieg district and in the permanent exhibition "Weights, scales and weighing through the ages" in the Meys factory in Hennef. There you will learn a lot about the unusual history of the scales and the rise of Hennef as an industrial location.

Precision and innovation for complex process engineering processes

Weighing technology plays a decisive role in complex process engineering procedures and is of great importance for the precise dosing and control of bulk materials. In Hennef, the city of scales, a pioneering invention was made in 1883 with the Chronos scale, which has had a significant influence on modern weighing technology to this day. At Opdenhoff, we continue this tradition and offer our customers innovative solutions for demanding processes in the process engineering industry.

Accurate dosing and control of material flows ensures high quality and efficiency in production. Opdenhoff has extensive expertise and experience in the selection and adaptation of scales for various process engineering applications.

Accurate dosing and control of material flows ensures high quality and efficiency in production. Opdenhoff has extensive expertise and experience in the selection and adaptation of scales for various process engineering applications.

Integration of the scale into networked processes

Advancing digitalization and networking offer new opportunities for integrating scales into networked processes. By integrating the scales into a higher-level control and management system, data can be recorded and analyzed to enable optimized control and monitoring of process engineering procedures.

Opdenhoff supports its customers in the seamless integration of scales into their process engineering processes.

Mr. Brunetti: Contact person for dosing systems

Book your free, no-obligation personal consultation with Antonio Brunetti for scales now.

Future prospects and the circular economy


Advancing digitalization and automation offer new opportunities for the further development of weighing systems. The networking of scales with other production units enables the efficient use of resources and an optimized circular economy. By monitoring and analyzing data, bottlenecks can be identified, waste reduced and sustainable production promoted. Opdenhoff is at the forefront of these developments and supports its customers in implementing future-proof and sustainable solutions.

In production, there are different types of scales that are used depending on the area of application and requirements. In addition to truck scales, there are also the following types of scales:

Platform scales

These scales are often stationary and have a flat platform on which the object to be weighed is placed. They are often used in logistics and goods receiving to determine the weight of pallets, containers or large objects. With OPD Assets, these platform scales can be digitized by equipping them with sensors and digital interfaces to automatically record the weight and transfer it to digital systems.

Dosing scales

These scales are used to measure and dose precise quantities of materials in a production process. They are used in the food, pharmaceutical, chemical and other industries where accurate quantities are important. With OPD Assets, dosing scales can be digitized and integrated into the production control system to automatically control and monitor dosing.

Laboratory balances

These scales are used in laboratories and research facilities to accurately weigh small quantities of substances. They often need to be very precise and have a high resolution. By integrating OPD Assets, laboratory scales can be equipped with digital interfaces to automatically record the weighing result and feed it into laboratory management systems.


These scales are used to check the weight of finished products and ensure that they meet the given specifications. They are often used in the packaging industry to ensure quality and compliance with weight specifications. By integrating OPD assets, checkweighers can be digitized to automatically check weight and detect deviations in real time.

Analytical balances

These balances are used in laboratories and analytical applications to weigh very small quantities of substances with high accuracy. They are often used in chemistry, pharmacy and other research areas. OPD assets enable the digital integration of analytical balances to transfer the weighing result directly into laboratory management systems and optimize the workflow.

With OPD Assets, we make these scales more digital and enable seamless integration into digital systems and processes. By recording and transmitting weighing data in real time, we offer our customers improved control, monitoring and evaluation of their weighing applications.

Depending on the application and industry, there may be other specialized types of scales. Any type of scale can be digitized with OPD Assets and integrated into a company's digital ecosystem to improve data flow and process optimization.

Assets Scales

Integration of scales into production sequences and company processes

Different scales - one digital twin

The digital value stream and digital twins created by OPD Assets open up new possibilities for integrating scales into production workflows and business processes. These digital images enable a virtual simulation of the real scales in digital environments, making processes more efficient, allowing data to be recorded and analyzed in real time and errors or deviations to be detected at an early stage.

Companies worldwide can benefit from the advantages of this standardized and digitized scale integration, regardless of the origin of the scales. The use of digital twins and the digital value stream makes it possible to optimize production, reduce costs and improve quality. This efficient integration and standardized processes create a basis for transparent value chains.

OPD Assets and the digital value stream revolutionize the integration of scales into business processes and allow to take full advantage of the digital transformation in the scale industry. Companies can easily manage, control and monitor their scales, regardless of manufacturer and location, leading to improved transparency, efficiency and global standardization.

Scale dosage


The scale is an indispensable instrument in complex process engineering procedures. Opdenhoff offers its customers innovative solutions and customized concepts for the precise weighing of bulk materials. By integrating the weigher into networked processes and customizing it to the respective requirements, we enable efficient and accurate dosing in the process industry. Contact Opdenhoff and find out how we can help you to increase the precision and efficiency of your process engineering processes.

GDPR Cookie Consent with Real Cookie Banner