Non-destructive, non-contact and real-time

With our µmagnetic measuring system you can check the hardness of ferromagnetic materials in a non-contact and non-destructive way. Real-time spectral analysis makes the properties of your material visible live.

Customer and process specific solutions

QASS adapts the µmagnetic measuring system ideally to your process and your requirements for non-destructive hardness testing. If you need a special sensor design, we will develop it. If you need an individual handling system, we will set up the QOBOT perfectly for you.

100% instead of random testing

Our µmagnetic technology can be integrated into all process stages of manufacturing. Be it material or mix-up tests before the first manufacturing step or quality tests in or at the end of the manufacturing process.

Hardness testing Pre-, In- and Post-Process

All applications of QASS µmagnetic are possible upstream, in-process and downstream of the finished component. Inspect your objects and material non-destructively and contact-free. The implementation in the process depends on the available space and the process control.

Micromagnetic Hardness Testing

To determine the hardness, the material to be measured is exposed to an alternating magnetic field and the reorientation of the individual magnetic domains in the microstructure of the material is measured. The time-amplitude signal recorded by the micromagnetic sensor is digitized by the QASS µmagnetic measuring system and processed by a Fast Fourier Transformation (FFT) in real time to reveal the frequency components (pitches) hidden in the signal. The method used by QASS for spectral analysis is called High Frequency Pulse Measurement (HFIM). Within the scope of the spectral analysis, machine noise and interference noise can be specifically filtered out of the signal data by means of a spectral filter (also called frequency mask). This improves the relationship between useful and interfering signals.

Flexible Range of Application

Cycle times in the order of seconds can easily be realized with the system. A hardness measurement with the QASS µmagnetic system usually takes less than one second. A hardness measurement consists of several individual measurements of the reorientation of the magnetic domains inside the material.

In addition to static measurements, our µmagnetic system allows measurements in motion. This allows the recording of hardness profiles, for example to assess the quality of weld seams or to examine tooth flanks for grinding burns. Since the measurement is contactless, contamination (oil, scale, etc.) or oxidation of the surface is irrelevant. The measurement in motion can be realized by QASS with the QOBOT handling system.

Micromagnetic as System Solution

Micromagnetic as system solution

The QOBOT handling system is based on an intelligent combination of sensor technology and robotics. It was developed by QASS especially for the µmagnetic technology and can be purchased together with it as a system solution.

The QOBOT is individually adapted by QASS to the process and the production environment. The system can be used pre-, in- and post-process. The AUBO-i5 Co-Bot built into the handling system can be used flexibly and, thanks to its movement range of 924mm**, enables hardness measurement of components with different geometries and lengths. A laser distance sensor detects the robot path so that the µmagnetic sensor is correctly positioned during the measurement. The control of the sensors and robotics installed in QOBOT is integrated with the µmagnetic measuring system.

Qobot handling system with micromagnetics sensor

The Zelos system was developed by QASS with the aim to support companies in quality assurance during sintering. The Zelos system is an automated laboratory system for testing the densification of sintered components. The measuring system is the QASS Optimizer4D with µmagnetic – the micromagnetic extension for hardness testing, grinding fire testing and segment density testing of sintered parts.

The Zelos system for testing sintered parts combines micromagnetic measuring technology with gentle component handling. Test specimens are gently removed from the holder by means of a pneumatically controlled magnetic gripper and guided to the micromagnetic sensor via two linear axes. A laser distance sensor ensures the correct positioning of the test specimen.

Sensor unit and gripper Zelos system

Contact Person

David Müller

Tel.: +49 (0) 2335 802018


Conventional hardness testing is often time-consuming and unsuitable in series production. With our contactless µmagnetic method, we want to revolutionize this area. Especially automated complete systems offer us completely new possibilities for process analysis.