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TOP 3 GOLD PURITY TESTERS MOST PREFERRED IN 2026
In an increasingly transparent gold market with stricter inspection standards, XRF gold purity testers have become essential equipment for jewelry stores. In this article, DC will help you understand the operating principles, practical value, and the Top 3 most popular gold purity testers in 2026.
I. What is a gold purity tester?
A gold purity tester (XRF analyzer) is an elemental analysis system based on X-ray fluorescence technology, enabling precise determination of gold (Au) content by weight percentage in accordance with TCVN standards. At the same time, it identifies alloying elements and impurities such as Ag, Cu, Zn, Ni, Pd, and Pt—without deforming or damaging the product.
Unlike traditional methods such as acid testing, melting, or sample cutting, XRF allows direct analysis on finished products including rings, necklaces, gold bars, cast blanks, and completed components. This capability is particularly critical for buying, selling, trade-in transactions, and on-site inspection at jewelry stores.
II. Basic working principle of a gold purity tester
A gold purity tester operates based on the principle of X-ray fluorescence (XRF), enabling fast, accurate, and non-destructive analysis of metallic elemental composition. From a technical perspective, this principle can be understood through the following core steps:
1. Atomic excitation by X-rays
The X-ray source in the instrument emits a beam with a defined energy onto the surface of the gold sample. This energy ejects inner-shell electrons of the metal atoms (such as Au, Ag, Cu, and Pd), creating an unstable energy state within the atoms.
2. Characteristic fluorescence emission
When electrons from outer shells transition to fill the vacant inner-shell positions, the atoms emit characteristic X-ray fluorescence with energies unique to each element. This “fingerprint” enables precise identification of the metals present in the sample.
3. Energy spectrum detection and analysis
The XRF detector captures the emitted fluorescent X-rays and converts them into an energy spectrum. The analysis software then:
– Identifies each element based on the position of its characteristic spectral peaks
– Calculates the elemental concentration (%) according to the signal intensity
4. Gold karat conversion and alloy structure analysis
Based on the measured Au content, the system automatically converts the result into gold purity (Karat) values such as 24K, 18K, or 14K, while simultaneously displaying the proportions of accompanying alloying metals. This enables a comprehensive assessment of purity, alloy composition, and material uniformity.
III. Why jewelry stores need a gold purity tester
For modern jewelry stores, a gold purity tester is not merely an inspection device, but a comprehensive tool for quality control, risk management, and brand credibility.
>> Read more: Why jewelry stores need to equip a gold testing machine
1. Ensuring accuracy and transaction transparency
A gold purity tester enables the determination of gold content in both percentage (%) and karat within seconds, allowing jewelry stores to perform fast and accurate verification during buying and selling transactions.
2. Detecting under-karat, alloyed, or gold-plated items
XRF analyzers identify the actual metal composition on the surface, enabling experts to make accurate and timely assessments.
3. Non destructive testing to preserve jewelry value
Unlike acid testing or destructive sampling, XRF analysis is performed directly on finished products without scratching, deforming, or causing any weight loss. This is especially critical for completed jewelry, display items, and high-value products.
4. Improving operational efficiency
The measurement time is only 5–30 seconds per sample, making it ideal for peak trading hours and multi-branch jewelry chains requiring synchronized quality control.
5. Enhancing professional image and brand credibility
Using an XRF gold testing machine directly at the counter provides immediate, visual trust for customers. It demonstrates professional testing capability and helps jewelry stores meet modern business and compliance standards.
IV. Top 3 gold purity testers preferred by jewelry stores
1. ECO X2 gold purity tester
ECO X2 is a benchtop XRF gold testing machine widely trusted by jewelry stores and gold workshops thanks to its fast analysis, high accuracy, and compliance with Vietnamese standards.
Key features of ECO X2:
– Accurate analysis of gold (Au) content and alloying elements such as Ag, Cu, Pd, and Pt
– High repeatability with low measurement deviation, suitable for continuous testing at the counter
– Effective detection of under-karat gold, alloyed gold, and gold-plated jewelry
– Fully compliant with TCVN 7055:2014 – the Vietnamese standard for gold purity testing using XRF technology
– User-friendly operation, suitable for both beginners and experienced professionals
Best suited for retail jewelry stores, gold buying and trading shops, and manufacturing workshops that require a stable, reliable gold testing machine with optimized investment cost.
>> Read more: 7 important criteria when buying a gold testing machine
2. SpectraX 20 gold purity tester
SpectraX 20 is an XRF gold analysis system engineered for long-term stability and reliability, making it ideal for jewelry stores with high daily testing volumes. Advantages of SpectraX 20:
– High-grade semiconductor detector delivering superior energy resolution
– Highly stable measurement results with minimal variation between tests
– Intuitive analysis software with clear, easy-to-read gold karat results
– Well suited for testing gold bars, finished jewelry, and semi-finished products
3. SpectraX 25 gold purity tester
SpectraX 25 is an advanced XRF gold testing system designed for users who require in-depth analysis of gold content and precious metals, particularly in manufacturing and export-oriented applications.
Key strengths of SpectraX 25:
– High sensitivity to precious metals, enabling accurate analysis of complex alloys
– Excellent control and evaluation of plated layers and surface inhomogeneity
– Optimized for continuous testing with consistently high accuracy
– Fully compliant with international inspection and testing standards
SpectraX 25 is the ideal choice for jewelry manufacturers serving export markets, inspection centers, and laboratory facilities specializing in precious metal analysis.
V. Where to buy a reliable gold purity tester
1. Criteria for choosing a trusted supplier
– Clear and traceable origin: The equipment must be supplied with full CO/CQ documentation, certificates of origin, and technical inspection records to ensure compliance with international standards.
– Calibration and maintenance services: Gold testing instruments require periodic calibration to maintain accuracy. A reputable supplier should provide long-term calibration, repair, and technical support services.
– Operational training support: This includes user training, measurement data management, error handling, and standardized equipment maintenance procedures.
– Software upgrades and standard updates: XRF systems operate most effectively when the software is regularly updated with the latest analytical algorithms and reference standards.
2. DC Technologies – 25 years of jewelry technology solutions
DC Technologies JSC is a leading provider of high-technology solutions in the Indochina region. The company is committed to delivering reliable, cost-effective solutions tailored to customer needs, fostering long-term partnerships and shared sustainable growth.
– More than 25 years of established reputation and industry credibility
– A team of technical experts with over 20 years of hands-on experience
– 24/7 technical support services, always ready to support and accompany customers
Conclusion
Gold purity analyzers are no longer merely tools to support transactions; they have become a mandatory technical standard in modern gold trading and inspection. Investing in the right XRF gold testing machine enables retailers to accurately determine Au content, detect under-karat gold and gold-plated products, standardize inspection procedures, and—most importantly—protect long-term brand credibility.
Depending on scale and operational needs, models such as ECO X2, SpectraX 20, and SpectraX 25 offer different values in terms of stability, analytical depth, and applicable standards. Beyond selecting the appropriate equipment, choosing a reputable supplier with professional calibration, maintenance, and technical support services is the key factor in ensuring sustainable and efficient operation.
With more than 25 years of experience in jewelry technology, DC Technologies is committed to partnering with retailers and enterprises to enhance inspection capabilities, optimize workflows, and meet the increasingly stringent technical standards of the market.
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