Sterlitech Corporation is adding new product options to its line of silt density index (SDI) testing devices. Sterlitech is offering these all-in-one units in response to the industry’s demand for a convenient and durable on-site tool for measuring the fouling capacity of the feed water used in reverse osmosis systems.
Silt density index testing quantifies the amount of particulate contamination in a water source and is used to estimate the rate at which membrane fouling will occur, particularly in applications employing reverse osmosis membranes. The SDI of a feed source is measured by running a stream of feed water through a 0.45 micron filter at a constant pressure and calculating the rate at which the flow slows down (ASTM Test Method 4189-07).
“Accurate and reliable SDI testing is key to maintaining good efficiency in membrane purification facilities and to help keep operating costs down, especially when dealing with sources like seawater which have a highly variable SDI,” notes Mark Spatz, founder and President of Sterlitech. “This can be an extremely valuable measurement when performed regularly.”
Unlike previous automatic SDI kits, the SimpleSDI kit is uniquely suited for testing in the field due to its lightweight structure and rechargeable battery, which allows up to 13 hours of use between charges. Accurate and repeatable SDI measurements are automatically calculated by means of the integrated microprocessor at 5, 10, or 15 minute increments. Replacement filter membranes, booster pumps, and a manual version of the kit are also available through Sterlitech.
Sterlitech Corporation provides superior laboratory products, specializing in flat sheet filter membranes and bench scale testing equipment for a variety of industries, including the occupational health and safety, petrochemical, fossil fuels and biotech industries. For precision and accuracy, Sterlitech’s membrane disc filters, filter holders, silt density index test kits, and syringe and capsule filters consistently relied upon to assure exceptional results.