Extrusion International 1-2018

26 Extrusion International 1/2018 QUANTUM 360 for Pipe Extrusion: 360-Degree Measurement of Wall Thicknesses and Diameters For some years now, iNOEX has been intensively working on the technical development and sale of Terahertz (THz) wall thickness measuring systems for the plastics industry and can justifi- ably call itself the pathfinder for this key technology. Terahertz radiation is in the frequency range between mi- With many years of experience and revolutionary technology, iNOEX based in Melle/Germany has for 33 years developed systems and technical concepts specifically designed for the pipe, profile, cable and film extrusion industry MEASUREMENT crowave and infrared radiation. Only a few years ago, this Terahertz frequency range was not at all or only partially us- able due to the lack of transmitter or receiver units – also referred to as the „Terahertz gap“ in the electromag- netic spectrum. It is to this very issue that iNOEX has addressed its R & D activities. The results are compact and inexpensive transmission and receiver systems tailor-made for the pipe ex- trusion process, with sufficient output power for wall thickness measurement. The technological progress of the past years has made these THz transmitters and receivers increasingly powerful and