Its measuring basic standard is volume,and use equivalent ball to show the measuring result. Measuring basic standard of traditional extinction sedimentation way is weight,and use sedimentation principle to measure sediment grain size.

• 它以体积为测量基准、用等效球体来表现测量成果,传统的消光沉降法是以重量为测量基准、使用沉降原理来测量泥沙颗粒的大小。