PARIO calculates the particle size distribution by Stokes’ law, with the range of particle sizes spanning from 63 μm to 1 μm. It allows for unattended, automated operation, with no interference by lab personnel. Just set it up and come back 6 hours later to a finished measurement with all the data you need. It’s measuring method is based on the well-established hydrometer or pipette method. That means there is no need for soil-specific corrections with transfer functions as required for almost any other automated measurement method, such as laser diffraction or image analysis.