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Arsalis is a spin-off of the Laboratory of physiology and biomechanics of locomotion (LOCO) and the Laboratory of rehabilitation and physical medicine (READ) of Université catholique de Louvain in Belgium. Since the early 1980’s, these laboratories have developed an expertise in the measurement of human motor performance and in the clinical evaluation of rehabilitation. Arsalis turns this expertise into industrial human performance evaluation systems.

Our expertise is in developing integrated hardware and software instruments for assessing physiological performance. Our know-how includes mechanical design, custom force sensor design, integration of industrial sensors (e.g. force, acceleration, pressure, position, angle, temperature and moisture), printed circuit board design (analog and digital signals, microcontroller signal processing), data acquisition system design (signal sampling and processing) and physiological data interpretation. While our products are assembled in house, Arsalis relies on a strong network of sub-contractors like machine shops, stain gauge specialists and printed circuit board manufacturers.

More recently, our university lab has acquired an expertise in Rasch analysis, which is particularly applicable to rehabilitation outcomes. Patient-related attributes, such as pain, intelligence, fatigue, disability, quality of life are generally assessed with questionnaires. These questionnaires report ordinal scores. In order to allow quantitative comparisons, either longitudinally or cross-sectionally, these scores need to be converted into true linear measures expressed on a continuous scale. The Rasch model is a probabilistic model that allows this transformation to be applied. Various rehabilitation scales have been developed in our lab by applying this methodology. Arsalis has developed the world’s first web engine that provides an online report of patient scores. We also provide services to the clinicians in order to exploit these instruments on a daily basis.

Arsalis was founded in 2005. Our team totalizes six man*decades of expertise in physiological measurement systems and in rehabilitation assessments, and has been involved in numerous national and international research projects (e.g. Fifth European Framework Program, European Space Agency and National Geographic Society). Arsalis takes pride in ensuring the highest technical and scientific quality of all their products.


Massimo PENTA

General Manager