SDI Hach Testing Kit
Overview: The Silt Density Index (SDI) test offers a quick and simple procedure to estimate particulate contamination in water.
Purpose: This index serves as a measure of particles, colloids, and other substances that could potentially obstruct water purification systems. It’s a straightforward and cost-effective test providing crucial data for selecting and positioning water purification devices.
No Instruments Required: Performing this test requires only a stopwatch and a 500 mL graduated cylinder. These items are readily available as Hach Product Numbers 2630200 and 108149, respectively.
Included in the SDI Hach Testing Kit:
- 47mm Diameter Filter Disc Holder: For holding the filter discs during testing.
- Pressure Regulator: Regulates the pressure during the filtration process.
- Pressure Gauge: Allows for monitoring the pressure applied during testing.
- PTFE Tape: Used for sealing threaded connections to prevent leaks.
- Tweezers: For handling the membrane filter discs with precision.
- Membrane Filter Discs: Essential components for capturing particles during the filtration process.
- Required Valves and Fittings: All necessary components for assembling and operating the filtration setup.
- Instruction Sheet: Provides detailed guidance on how to conduct the test effectively.





