SDI-KIT-AL Aluminum Alloy Manual SDI Tester | Portable & Online Dual Mode, A Reliable Choice for Water Treatment Industry

1. Product Introduction

We invite you to discover the SDI-KIT-AL—a high-quality, manual SDI tester constructed from durable aluminum alloy. This manual SDI test kit is the ideal choice for water treatment engineers, power plant operations and maintenance personnel, and laboratory technicians seeking to quickly and accurately determine the Silt Density Index (SDI) of water. Strictly adhering to the international standard ASTM D4189-07, this kit provides a complete, ready-to-use solution that ensures reliable and consistent test results every time. Designed for versatility, the device supports both handheld portable use and fixed-position online testing modes. Its core component—the filter holder—is crafted from anodized aluminum alloy, while the gaskets are made of thickened 316 stainless steel; this construction ensures a robust, aesthetically pleasing unit with exceptional pressure resistance. Operation is simple, requiring only the addition of a 500 mL graduated cylinder and a stopwatch. By providing critical data support for the stable operation of water treatment equipment—such as Reverse Osmosis (RO) systems—this kit stands as the preferred, high-value, and highly reliable SDI testing solution for professionals across the water treatment industry.

The SDI-KIT-AL Aluminum Alloy SDI Tester (Silt Density Index Tester) is a manual silt density index testing device specifically designed for the water treatment industry. It supports both handheld portable use and online fixed testing, fully complying with the ASTM D4189-07 international standard. This device can accurately monitor the concentration of suspended particles in water and their fouling tendency, providing core data support for the stable operation of water treatment equipment such as Reverse Osmosis (RO) systems. Its core component, the filter holder, is made of anodized aluminum alloy, and the gasket is made of thickened 316 stainless steel, which is elegant, durable and high-pressure resistant. Only a 500ml measuring cup and a stopwatch are needed for testing, making it the preferred cost-effective SDI testing solution for foreign trade customers, widely applicable to various water treatment testing scenarios.

2. Why Choose This Aluminum Alloy SDI Tester

The SDI-KIT-AL aluminum alloy manual SDI tester combines practicality and durability. The system includes a pressure regulator, a pressure gauge,a 47mm filter holder, SDI membrane filters, and matching valves and fittings. The filter holder is made of high-quality anodized aluminum alloy, rather than ordinary PP plastic, offering not only a more aesthetically pleasing appearance but also superior wear resistance, avoiding the aging, deformation, and breakage issues common with PP plastic filters over long-term use. Simultaneously, the high strength of the aluminum alloy, combined with thickened 316 stainless steel gaskets, significantly enhances the equipment’s pressure resistance, minimizing leakage and deformation during testing and ensuring stable and reliable operation. The SDI-KIT-AL aluminum alloy manual SDI tester fully complies with the ASTM D4189-07 international standard. Equipped only with a 500ml graduated cylinder and a stopwatch, it can perform online SDI measurements without complex operation or specialized skills, making it an ideal choice for the water treatment industry. Whether for daily monitoring of reverse osmosis (RO) system feed water or on-site water quality assessment, this SDI instrument, made of high-quality aluminum alloy, is an indispensable and powerful assistant thanks to its durability, stability, and accuracy. It is especially suitable for bulk purchases by foreign trade customers, as it can meet the water quality testing standards of different countries and regions, and reduce long-term operating costs for customers with its high cost-effectiveness.

3.Product Advantages

• Compliance: Strictly adheres to ASTM D4189-07(14） testing standards
• Portable Design: Lightweight structure, suitable for on-site testing
• Easy Operation: Integrated design, quick start to testing
• Durable and Reliable: Premium plastic construction offers corrosion resistance and wear durability

4. Technical Parameters

5.Configuration List

We offer three configuration options:

• High: One SDI instrument, 100 pieces SDI filter membranes, one tweezer, one stopwatch, one 500ml measuring cup, and one portable toolbox.
• Standard: One SDI instrument, 100 pieces SDI filter membranes, one tweezer.
• Basic: One SDI instrument, 25 pieces SDI filter membranes.

6. Required accessories

• Precision stopwatch ：0.2-second accuracy
• measuring cup：500ml PP
• SDI membrane :47mm diameter, 0.45μm pore size test filter membrane (consumable)

7. Optional Accessories

• SDI booster pump（Inlet pressure <35psi）
• portable toolbox

8. Application Scenarios

This Manual SDI test kit is widely used in the following fields:

•  Feedwater monitoring for reverse osmosis (RO) pretreatment systems
• Water quality testing of boiler feedwater in power plants and chemical plants
• Industrial water quality assessment
• Laboratory water sample analysis and research
• Any situation requiring monitoring of the potential for suspended solids and colloidal contamination in water

Frequently Asked Questions (FAQ)

Q: Are any additional accessories required?

A: The kit offers different configuration options. If you choose the high configuration, no additional accessories are needed. For the standard or basic configurations, which include the main components, we recommend having a stopwatch and a 500ml measuring cup on hand.Of course, the inlet pressure must exceed 35 psi (0.25 MPa).

Q: Can SDI be tested if the inlet pressure is less than 35 psi (0.25 MPa)?

A: If the inlet pressure is less than 35 psi (0.25 MPa), it cannot be ensured that the pressure before the membrane will remain at 30 psi during testing. Please use an SDI booster pump to increase the water sample pressure to above 35 psi.

Q: Is this manual SDI tester easy to operate?

A: Yes, our SDI test kit prioritizes user-friendliness. It includes clear operating instructions, enabling even non-professionals to perform accurate SDI measurements independently after brief training.

Q: Is technical guidance provided?

A: We provide SDI operating manuals, technical support services, and instructional videos for reference.

Q: What is the filter membrane’s lifespan?

A: Each filter membrane is for single use only. Configurations can be selected based on testing frequency.

Q: As the filter membrane is a consumable, how can I purchase it?

A: We offer dedicated test filter membranes with a 47mm diameter and 0.45μm pore size that are perfectly matched to this SDI test kit. You can easily order them individually from our company.

Q: How is the accuracy of the test results ensured?

A: This product strictly adheres to ASTM D4189-07 standards throughout design, manufacturing, and component selection. The included pressure-reducing valve and precision valve ensure stable pressure and flow during testing—critical for obtaining accurate SDI values.

Q: Is the SDI-KIT-AL Tester compliant with international standards?

A1: It is fully compliant with the ASTM D4189-07 international testing standard. Each device undergoes strict calibration, with accurate and authoritative test data, which can meet the water quality testing standard requirements of most countries and regions around the world, suitable for foreign trade exports.

Q: Is the device difficult to operate? Do professional technicians need to be involved?

A2: The operation difficulty is extremely low, and no professional technicians are needed. During testing, only a 500ml measuring cup and a stopwatch are required, and the SDI value can be measured by following the steps in the manual. It can be used out of the box, greatly reducing the operation threshold.

Q: What is the approximate service life of the filter holder and gasket?

A3: The filter holder is made of anodized aluminum alloy, which is corrosion-resistant and wear-resistant, and can be used for 3-5 years under normal use conditions; The thickened 316 stainless steel gasket has a service life of up to 2-3 years. If leakage, deformation and other problems occur, it can be replaced separately with low maintenance cost.

Q: The device supports both online and portable testing modes. Is it easy to switch?

A4: Switching is very convenient and no additional tools are needed. The portable mode can directly hold the device and connect to the water sample for testing; The online mode only needs to fix the device on the water treatment pipeline through supporting connectors, and continuous monitoring can be realized after debugging. Switching between the two modes only takes about 5 minutes.

Q: What customized services are available for foreign trade purchases?

A5: Supports a variety of customized services for foreign trade, including customized logo and packaging design, providing English product information and English operating instructions, and providing full assistance in solving export logistics, customs clearance and other related issues to meet the needs of bulk purchasing in foreign trade.

Q: What should I do if the device malfunctions? What is the after-sales guarantee?

A6: The product comes with a 1-year warranty. For quality problems caused by non-human damage during the warranty period, free repair or replacement of accessories is available; Paid repair services are provided after the warranty period. At the same time, 24/7 online technical support is provided to promptly answer questions during use, reducing after-sales concerns.

Contact Us

If you have any questions about the SDI-KIT-AL Aluminum Alloy SDI Tester, or need to obtain product quotes, bulk purchase plans, English materials, etc., please feel free to contact us. We will provide you with professional and efficient services to help you expand overseas markets.