DM2402 ISO 20884 ASTM D7220 Portable Micro Sulfur Chlorine Analyzer MEDXRF ASTM D7039 ISO 15597 Oil Trace S Cl Content Tester
Description
Type:
Testing Machine
Accuracy Class:
High Accuracy
Accuracy:
/
Application:
Auto Testing
Customized Support:
OEM, ODM, OBM
Power:
---
Protection Class:
Ip56
Voltage:
220 V
Warranty:
1 Year
Weight:
5.2kg
Highlight:
portable sulfur chlorine analyzer
,
micro oil trace tester
,
MEDXRF lab test machine
ISO 20884 ASTM D7220 Portable Micro Sulfur Chlorine Analyzer MEDXRF ASTM D7039 ISO 15597 Petroleum Trace S Cl Content Tester
Overview
The DM2402 MEDXRF portable trace sulfur and chlorine analyzer, also known as the DM2402 monochromatic excitation energy-dispersive X-ray fluorescence portable trace sulfur and chlorine spectrometer, is a state-of-the-art instrument developed by our company based on decades of research experience in X-ray fluorescence (XRF) technology. Building upon our existing DM series XRF sulfur analyzers, multi-element XRF analyzers, and wavelength-dispersive XRF multi-channel spectrometers, this new device represents an internationally leading advancement in portable XRF trace analysis for sulfur and chlorine.
The instrument incorporates advanced technologies and components that enable selective excitation through monochromatic focusing of characteristic X-ray spectra from the target material, effectively reducing background interference and significantly improving peak-to-background ratio. It also features a proprietary optical system and unique technical solutions developed independently by our company, specifically optimized for light elements. As a result, this sulfur and chlorine analyzer—equipped with a 15W X-ray tube—can achieve exceptionally low detection limits of 0.5 ppm for sulfur and 0.3 ppm for chlorine under ambient atmospheric conditions, delivering outstanding repeatability, stability, and reliable performance for trace-level detection of sulfur and chlorine.
The DM2402 MEDXRF portable trace sulfur and chlorine analyzer is a compact, lightweight instrument weighing approximately 5.8 kg (including battery and printer), making it highly portable. It requires no gas, vacuum, or dilution, making it ideal for rapid on-site testing and analysis. The device fully complies with current standards for detecting sulfur and chlorine content in China's National V and VI gasoline and diesel fuels, as well as fuel oil sulfur content requirements for inland, coastal, and deep-sea vessels. For sulfur measurement, it meets standards such as GB 252, GB17411, GB/T17040, ASTM D7220, ASTM D7039, SH/T0842, and ISO20884; for chlorine measurement, it complies with SH/T 0161, ASTM D4929, and ISO15597.
Low detection limit (300s) (atmospheric):
S: 0.5 ppm, Cl: 0.3 ppm.
Only 5.2 kg (including battery and printer).
Meets the ultra-low sulfur detection standards for automotive gasoline and diesel under China's National V and National VI emission regulations.
Meets the ultra-low sulfur fuel oil testing standards for inland, coastal, and ocean-going vessels.
Figure 1. Schematic diagram of the MEDXRF analysis technique
The limit of detection (LOD) for an X-ray fluorescence spectrometer refers to the concentration corresponding to three times the standard deviation of the instrument background signal produced by the matrix blank.
In the equation, Rb is the background counting intensity, N is the counting intensity of a low-concentration sample with known concentration C, and T is the measurement time. From Equation (1), it can be seen that the detection limit is inversely proportional to sensitivity (N - Rb)/C and directly proportional to the square root of the background Rb. To reduce the detection limit under a fixed measurement time, it is necessary to increase sensitivity and/or reduce the background.
Figure 2. XRF spectrum of the sample
A major reason why traditional XRF, whether EDXRF or WDXRF, cannot achieve low detection limits is that the scattering of continuous bremsstrahlung radiation from the X-ray tube's emission spectrum results in a high continuous scattered background in the fluorescent spectrum.
Monochromatic Excitation Beam Energy Dispersive X-Ray Fluorescence (MEB-EDXRF) analysis is a technique that uses optical components to monochromatize the X-ray tube emission spectrum, thereby significantly reducing the continuous scattering background in the fluorescent spectrum. At the same time, it minimizes the reduction—or even increases—intensity of the desired monochromatic X-ray line or narrow energy band used for excitation, thus greatly lowering the detection limit. Compared to conventional EDXRF, this method achieves a 1 to 2 order of magnitude improvement, and even outperforms high-power WDXRF systems (such as 4 kW).
There are many methods to monochromatize the X-ray tube emission spectrum, including filter methods, secondary target methods, and diffraction methods. Among these, the doubly curved crystal (DCC) in diffraction methods offers the best monochromatization and highest efficiency.
Diffraction must satisfy Bragg's law:
nλ = 2d sinθ (2)
Figure 3. X-ray tube emission spectrum and characteristic X-ray incident spectrum monochromatized by LSDCC
In other words, only rays emitted from the source with wavelengths satisfying equation (2) are diffracted, resulting in excellent monochromatization. Since the DCC can focus a point source, it offers a large collection solid angle and thus achieves extremely high efficiency. Additionally, focusing produces a very small light spot on the sample, enabling small-area semiconductor detectors such as Si-PIN or SDD to capture most of the fluorescent X-rays from a small sample area. Therefore, the DCC also enhances detection efficiency.
Figure 4. Schematic of LSDCC point-to-point focusing principle
DCCs are further classified into semi-focusing (Johann), fully focusing (Johansson), and logarithmic spiral types based on their curved surfaces. Among them, semi-focusing only partially satisfies the diffraction condition, resulting in the poorest monochromatic X-ray incident spectrum from semi-focusing DCCs. Fully focusing DCCs completely satisfy the diffraction condition and achieve point-to-point focusing. However, the manufacturing process for fully focusing DCCs is extremely complex; in addition to bending, they require a precision grinding process to form an R-shaped curved surface. Natural crystals such as Si and Ge are very brittle and difficult to grind, while synthetic crystals cannot be ground at all. Moreover, natural crystals typically diffract X-rays only within a very narrow spectral range, causing only a portion of the characteristic X-rays from the target material to be diffracted and resulting in low integrated diffraction efficiency.
The DM2402 employs the Logarithmic Spiral Double Curved Crystal (LSDCC) DM30L, a patented product developed through two years of dedicated research by our company's technical experts. The LSDCC fully satisfies diffraction conditions; although focusing is not strictly point-to-point but rather point-to-surface, the surface area is extremely small—typically only about 2 mm—making it effectively equivalent to point-to-point focusing. It uses an artificial DM crystal, whose integrated diffraction efficiency is 3 to 10 times higher than that of natural crystals. Additionally, the crystal requires only bending and no grinding or splicing, making manufacturing convenient.
High-resolution (129 eV) and high-count-rate (2 Mcps) SDD detector
There are many types of X-ray detectors, including proportional counters, Si-PIN detectors, and silicon drift detectors (SDDs). The lower the detection limit, the higher the detector's resolution and count rate. Among them, SDDs offer the highest resolution and count rate, making them the best choice for detectors.
The DM2402 is equipped with a VITUS H20 CUBE (top-grade) SDD detector manufactured by KETEK Germany, featuring a resolution of less than 129 eV, an effective detection area of 20 mm², and a counting rate of 2 Mcps.
Figure 5. Silicon Drift Detector (SDD)
Micro-focus thin beryllium window X-ray tube with optimized kV, mA, and target material combination
The higher the X-ray excitation energy of the sample is close to the absorption edge of the element to be analyzed, the greater the excitation efficiency. The DM30L crystal diffracts only the high-intensity characteristic X-rays emitted from the anode material in the X-ray tube output spectrum. Therefore, selecting an appropriate anode material can achieve the highest excitation efficiency. With a fixed maximum power of the X-ray tube, such as 15 W, the optimal combination of tube voltage (kV) and current (mA) yields the highest excitation efficiency. Due to the point-to-point focusing design, a micro-focus X-ray tube must be used. Since the characteristic X-ray energies of the anode material are very low, a thin beryllium window X-ray tube is required.
The DM2402 uses a 15W micro-focus Ti or Ag anode with a thin beryllium window X-ray tube, optimized for kV and mA settings.
It is applicable for on-site rapid detection and analysis of trace sulfur and chlorine contents in oil products such as gasoline, diesel, and fuel oil. For example, it can be used for the detection of trace sulfur and chlorine in vehicle gasoline, marine diesel, fuel oil, and gasoline and fuel oil in circulation processes.
It is also applicable to refineries, testing and certification institutions, oil depots, laboratories for various oil products, additives, and lubricating oils containing additives, such as gasoline, diesel, heavy oil, residual fuel oil, as well as the detection of trace sulfur and chlorine in products during the refining process.
It is also applicable to the simultaneous measurement of chlorine in aqueous solutions and the elements S and Cl in any materials across various industries.
Characteristics
Quick and simultaneous – The required measured elements are analyzed simultaneously at high speed, and the content results are generally available within a few minutes.
Compact and lightweight – weighing around 5.2kg (including battery and printer), it offers atmospheric measurement without the need for additional equipment. It is particularly suitable for on-site rapid detection.
Long-lasting usage – With extremely low power consumption, it uses lithium-ion batteries and can be used continuously for a long time.
Low detection limit – Utilizing MEDXRF technology and LSDCC core technology, a low detection limit is achieved, with excellent repeatability and reproducibility.
Long-term stability – Utilizing digital multi-channel technology, featuring automatic PHA adjustment and deviation correction functions, it exhibits excellent long-term stability.
Environmental protection and energy conservation – Radiation protection meets exemption requirements. During analysis, there is no contact or damage to the samples, no pollution occurs, no chemical reagents are needed, and no combustion is required.
Easy to use - Touchscreen operation. Simply place the sample into the sample cup and insert it into the instrument. Then, just press the [Start] button and it's all done - truly achieving one-click operation.
High adaptability - Automatic correction of C/H ratio, correction for matrix effect, suitable for various samples. Automatic switching of working curve, suitable for wide measurement range.
High reliability - Integrated design, high degree of integration, strong environmental adaptability, strong anti-interference ability, and high reliability.
High cost-effectiveness - No need for gas, vacuum or dilution. The operating and maintenance costs are extremely low. At half the price of similar products abroad, it is a truly cost-effective product.
ISO 20884 ASTM D7220 Portable Micro Sulfur Chlorine Analyzer MEDXRF ASTM D7039 ISO 15597 Petroleum Trace S Cl Content Tester
For S: meets requirements of GB 252, GB 17411, GB/T 17040, ASTM D7920, ASTM D7039, SH/T 0842, ISO 20884, etc. For Cl: meets requirements of SH/T 0161, ASTM D4929, ISO 15597, etc.
Analysis Accuracy
Complies with relevant standard specifications
System Analysis Time
1~999s, recommended: 300s or 600s for trace measurement, 60s for routine measurement
Your message must be between 20-3,000 characters!
English
