The SA-100 soil aggregates analyzer can separate standard-sized soil particles without affecting the soil structure. The instrument contains 6 standard sieve aperture separation sieves (5.0mm, 3.0mm, 2.0mm, 1.0mm, 0.5mm, 0.25mm). By vibrating the separation sieve up and down in the water, six particle sizes are finally separated from the soil. And four samples can be analyzed simultaneously.