We offer systems to assess the dimensional properties of both natural and technical fibres, for use in conjunction with mechanical deformation data. The FDAS770 (Fibre Dimensional Analysis System) is perfectly suited to fibres with an irregular cross-sectional profile, opaque in nature and >10μm in diameter. The LDS0200 (Laser Diffraction System) is designed around the diffraction of light. Using a targeted laser beam, a smooth, regular shaped sample can be measured to as little as 4μm.

The FDAS770 utilises a Laser Scanning Micrometer, to allow accurate, non-contact dimensional measurement of fibres for the normalisation of mechanical (stress) data. It allows for cross-sectional area calculation, with fully automated fibre rotation and translation. Full data collection also allows for cross sectional profile shapes to be assessed.

FDAS770 Brochure


Dia-Stron LEX-LDS fibre diameter measuring system - close up image

The LDS0200 is designed for direct, non-contact diameter measurements of small, opaque fibres. The laser diffraction principle used allows for diameter measurements as small as 4μm. When the sample is placed in a laser beam, new sources of coherent light appear on each side of the filament, producing an interferometric fringe pattern. Deviation of these light rays is due to the material tangential effect. This diffraction pattern is directly correlated to a calibrated linearization to determine the samples diameter. The system is fully calibrated, temperature compensated and insensitive to vibrations due to the high speed scanning rate.

LEX-LDS Brochure


The DSM770 (Dynamic Swelling Module) is designed specifically to measure the dynamic swelling of single fibres in water, interpreted as a swelling profile. The DSM770 is designed to be used in conjunction with our FDAS System range, either from new or as a flexible upgrade to existing systems to improve capability.

This flexibility means the DSM770 is capable of being configured to run dimensional analysis in a Dry or Wet state depending on requirements.

DSM770 Brochure