Silt Density Index Meter Test Kit

Product Specifications Silt Density Test Kit

What is the silt density index?

Silt is composed by suspended particulates of all types that accumulate on the membrane surface. Sources of silt are organic colloids, iron corrosion products, precipitated iron hydroxide, algae, and fine particulates. Silt Density Index testing is a widely accepted method for estimating the rate at which colloidal and particle fouling will occur in water purification systems, especially using reverse osmosis (RO) or Nanofiltration membranes.

SDI is a measurement of the fouling potential of suspended solids. It’s not measuring the quantity of particular matter, since the size and shape  can vary. Turbidity is a measurement of the amount of suspended solids. They are not the same and there is no direct correlation between them. In practical terms however, the membranes show very little fouling when the feed water has a turbidity of < 1 NTU. Correspondingly the membranes show very low fouling at a feed SDI of less than 5.

The SDI test is used to predict and then prevent the particulate fouling on the membrane surface. Other names for it are the Kolloid-Index (KI) or the Fouling-Index (FI). The test is defined in ASTM Standard D4189, the American Standard for Testing Material.

It measures the time required to filter a fixed volume of water through a standard 0.45µm pore size microfiltration membrane with a constant given pressure of 30 psi (2,07 bar). The difference between the initial time and the time of a second measurement after normally 15 minutes (after silt-built up) represents the SDI value.

Product Description

Silt Density Index (SDI) Meter Test Kits are a useful tool for determining the fouling potential of water in industrial and commercial applications. In this article, we’ll take a closer look at the benefits of using an SDI Meter Test Kit.

1. Accurate Results: An SDI Meter Test Kit provides accurate and reliable results, allowing you to make informed decisions about your water treatment system. This can help you optimize your system’s performance and reduce the risk of downtime and maintenance.
2. Easy to Use: SDI Meter Test Kits are designed to be easy to use and require no specialized training or expertise. The simple step-by-step instructions make it easy to perform the test and interpret the results.
3. Time-Saving: SDI Meter Test Kits can save you time by allowing you to quickly determine the fouling potential of water samples. This can help you identify potential issues early on, before they become more serious and costly to fix.
4. Cost-Effective: SDI Meter Test Kits are a cost-effective solution for monitoring water quality. They are relatively inexpensive compared to other water testing methods and can help you avoid costly downtime and maintenance.
5. Versatile Applications: SDI Meter Test Kits can be used in a wide range of applications, from industrial and commercial water treatment to drinking water treatment. This makes them a versatile tool for monitoring water quality in a variety of settings.
6. Regulatory Compliance: Many regulatory agencies require SDI testing as part of their water quality monitoring requirements. Using an SDI Meter Test Kit can help you stay compliant with these regulations and avoid fines or other penalties.

In conclusion, an SDI Meter Test Kit is a useful tool for monitoring water quality in industrial and commercial applications. Its accuracy, ease of use, and cost-effectiveness make it a popular choice for water treatment professionals. Additionally, its versatility and regulatory compliance ensure that it is a valuable tool for ensuring water quality in a range of settings. Whether you are a water treatment professional or a facility manager, an SDI Meter Test Kit can help you optimize your water treatment system and avoid costly downtime and maintenance.