SDI – Silt Density Index, is a measure of presence of suspended solids (SS) in feed water. Measure and control of SDI is important in membrane based water treatment systems, since excess SS could clog the membrane surface.
SDI 15 values range from 0 to 6.77, with 6.77 as maximum.
All RO/ Nano membrane manufacturers specify a limit of SDI15 < 5 for smooth operation of the membranes.
Our Auto SDI kit is used to measure the SDI value of any given water stream inside a pipe with the least possible human effort.