The positioner CMSI is part of a carefully designed product architecture for the control of streams of highly viscous media, liquids, gases and vapours in piping systems. The integrated piezo valve technology ensures a long service life and high control quality, even in critical applications. The integrated error diagnostics and the clearly visible LED status indicator ensure that the positioner is safe in operation. Its compact design, high class of IP protection and the integrated air ducting between the positioner and the drive make it robust and reliable.