Content - Instruments


The USTER® ZWEIGLE HL400 measures hairiness length, so spinners can forecast how a yarn will look and perform downstream. Its sensitive measuring system focuses on protruding fibers in the yarn.


Yarn hairiness impacts on many aspects of fabric quality for various textile end-uses. The USTER® ZWEIGLE HL400 hairiness tester takes the globally-established ‘S3’ Hairiness value to a new level. It now operates eight times faster than previously – at  400 m/min – with improved accuracy.


  • Displays the number of protruding fibers in seven different length categories.
  • Integrates with the USTER® TESTER 5 and its OH hairiness sensor to cover every hairiness testing requirement.
  • Tests any type of staple yarn.
  • Self-calibrates, to prevent operator error.