On-Line Silt Density Index Analyser
Suspended solids and colloidal materials causes membrane fouling in RO system. In order to take some measure of the degree of this fouling problem. SDI test is required.
RO element specifications usually call for the SDI value to be below 5.
Water sources in a RO system often change their water quality and this often needs to be done weekly or monthly. With the RizonSDI tester this is done on-line.