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Fredrik Arrhén

Senior scientist

Tel

+46 10 516 56 24

Email

fredrik.arrhen@ri.se

Location

Borås

Active in mass-related quantities, measurement quality and uncertainty as well as dynamic measurements of mechanical quantities.

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Ask me about

Ask me about

Optical Torque Transducer & Digital Twin for Rotary & Dynamic Torque

Developing an Optical Torque Transducer and a Physics-Based Digital Twin for Rotary and Dynamic Torque Measurement.

Dynamic force calibration using impact hammer

The project will develop technical competence and ability to measure dynamic force.

New method for measuring dynamic pressure

RISE is working to develop measurements of dynamic processes. Dynamic calibration of pressure sensors is an area that is important for reducing measurement uncertainty in industry.

Extending dynamic traceability to high pressure

RISE has long been developing standards for measurements of dynamic processes. Dynamic calibration of pressure sensors is an area that is important for reducing measurement uncertainty, but traceability is lacking.

Calibrating torque transducers during rotation

The project will develop methods and systems for calibrating torque transducers during rotation.

Dynamic measurements

The knowledge platform for Dynamic measurements is a long-term investment where RISE, together with academia and industry, builds and spreads competence within measurement, calibration and traceability of fast mechanical processes…

Secondary system dynamic pressure

The project aims to enable the characterization of dynamic pressure sensors in a continuous frequency range from static pressure to hundreds of kilohertz by bridging the frequency gap between static pressure standards and shock tu…

2026 EURAMET Workshop on Dynamic Measurements of Mechanical Quantities

RISE has the pleasure to invite you to attend the 2026 EURAMET workshop on dynamic measurements of mechanical quantities, which will take place from 3 March to 4 March 2026 at RISE in Borås, Sweden.

Fast and correct measurements are difficult

Measuring is about acquiring a basis for decisions. But how can we know that our measurements can be trusted? When it comes to rapid changes and dynamic events, it can be difficult.

National Laboratory for Pressure/vacuum

RISE is the National Metrology Institute of Sweden and is responsible, through its National Laboratories, for the fundamental measurement quantities in the International System of Units (SI).

Dynamic pressure testing

One of a few test beds globally that is primary used for research/testing and characterization of dynamic pressure measurement systems.

Density control / Leak detection

Looking for gas leaks can be frustrating! To find leaks quickly and to assess whether they are too large to pass, it helps to know some of the underlying theory and "tips and tricks".