In practice the measuring of three-dimensional tube figures is often done by portable coordinate measuring arms. With the TUBOSCAN C and the TUBOSCAN M Tracto-Technik offers two various arm systems, which differ in its hardware components, the measuring method, the measuring range and the measuring accuracy. The TUBOSCAN C is available in several versions with measuring ranges from 1.80 m up to 4.60 m. This arm can be equipped with various contact probes (e.g. Renishaw probes, ball probe, tip probe) or touch-less infrared tube measuring fork.