The MDTA 4 processes raw cotton from the bale, tufts before carding, or card- and draw-frame slivers. It provides data relating to impurities – such as neps, seed-coat neps, trash, dust, and fibre fragment content. Finally, as an additional feature, the MDTA 4 can be used to determine the stickiness of raw cotton. The MDTA 4 can be combined with the NT-DA module for precise analysis of the number and size of impurities.

When applied to man-made fibres (e.g. polyester staple fibres, PSF), MDTA 4 can be used to sort out impurities such as fused fibres and other imperfections.

Based on the well-proved MDTA 3 model, MDTA 4 now offers in addition a measurement of the length of individual fibres floating in an air stream.

By processing the cleaned ring-shaped fibre strand provided by the MDTA 4, an OE yarn for further analysis can be produced, e.g. for the measurement of evenness, hairiness, tensile strength, and elongation. When using a blend with chemical fibres instead of pure cotton, even blended yarns can be spun on laboratory scale.