The DYNATENS is a dynamic tensile tester dedicated to the detection and characterization of weak spots in staple fibre yarns.

The instrument continuously subjects the tested yarn with an increasing amount of stretch resulting in up to 12 yarn breaks per second at yarn feeding speeds of up to 800 m/min. Additionally, almost the full length of the yarn (> 90 %) which is passed into the instrument is checked. In this way, the chance of overlooking a weak spot is minimized which corresponds to highest testing efficiency.

At the same time, DYNATENS also measures the average breaking strength and the average elongation at break reliably.