BTD (Büro für Technische Diagnostik GmbH & Co.KG) was founded in January 2001. Although a very young company, they have many years of professional experience and extensive expertise in the field of NDT testing and technical diagnostics. Work focuses on the automation of measurement and testing. BTD’s focus is the manufacture of automatic test equipment going from development and construction to installation. In addition, they also offer service inspection using their equipment, separate software solutions. BTD’s role in the project will subcontract work to BAM for the development of a novel phased array probe based on their existing technologies for the inspection of hollow axles from the inner surface. They have a particular interest in developing solutions for railway axle inspection and have the essential expertise and knowledge for the success of this project.