Particle Size Analysis

We have over 25 years experience in particle size analysis, and have analysed more than 20,000 samples by laser diffraction, including sediments, soils, natural water, sludge, construction materials, woodchip pellets and unknown powders and suspensions. Our services include:



We are members of the NMBAQC Scheme, and validated by the MMO for particle size analysis of marine sediments


For all enquiries, please contact us by email or on +44 (0)121 506 9067.





Particle Size Classification

As part of our strategic research we have developed a new particle size classification (PSC) and a new particle size distribution classification (PSDC, frequently referred to as 'texture') with new systems of nomenclature for each. A computer program, in Microsoft Excel 2007/2010 format, is freely available which automatically classifies sediment or soil samples in terms of the percentages of gravel, sand and mud (GSM) or sand, silt and clay (SSC). Full details of the classification scheme are currently in press.


Click the following links to download the classification schemes and software: