Compare WDXRF Products

High-performance wavelength dispersive X-ray fluorescence spectrometers

Wavelength dispersive X-ray fluorescence (WDXRF) analyzers are widely used for quantitative elemental analysis across a variety of materials. To select the optimal system, it is important to consider sample type, analytical objectives, and throughput requirements. Rigaku offers two optical configurations—sequential and simultaneous—to suit different analytical needs and workflows.

Rigaku’s WDXRF lineup provides solutions for a wide range of applications, from advanced materials research to routine quality control. Each model is optimized to deliver the best balance of precision, flexibility, and performance for your laboratory.

Rigaku's WDXRF spectrometers
How to select the appropriate WDXRF
At-a-glance comparison

Primus IV, Simultix, Supermini (450x450)

ZSX Primus IV𝒾

For comprehensive multi-material analysis

Rigaku ZSX Primus IV𝒾 is a high-precision, tube-below WDXRF spectrometer built on an industry-standard configuration widely adopted for versatile materials analysis.

This geometry enables accurate and efficient measurement of liquids, metals, and flat solid samples with outstanding repeatability.

Combining versatility with operational efficiency, the ZSX Primus IV𝒾 offers an ideal balance of performance and practicality for quality control and multi-material laboratories.

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ZSX Primus IV

For ultimate analytical versatility

Rigaku ZSX Primus IV is the flagship sequential WDXRF spectrometer in the Primus series, engineered for laboratories demanding the highest analytical performance.

With a powerful 4 kW X-ray tube and an advanced optical system, it delivers exceptional sensitivity and accuracy across the entire elemental range from Be to Cm.

Its precision-engineered tube-above geometry supports high-intensity operation while preventing contamination, ensuring unmatched analytical stability for powders, pellets, and irregular solids—ideal for cement, ceramics, catalysts, and geological applications.

Optional mapping and micro-area analysis capabilities further expand its analytical flexibility, making ZSX Primus IV the most capable and versatile model in the ZSX Primus lineup.

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ZSX Primus III NEXT

For robust and affordable routine analysis

Rigaku ZSX Primus III NEXT is a durable and cost-efficient tube-above WDXRF spectrometer designed for precise elemental analysis in daily quality control and production environments.

With a proven 3 kW X-ray tube and optimized optics, it provides excellent accuracy and long-term stability across the full elemental range from Be to Cm.

The tube-above geometry minimizes contamination of the X-ray tube and optical components, resulting in superior robustness and reduced maintenance requirements.

Combining an affordable initial cost with dependable long-term performance, ZSX Primus III NEXT delivers outstanding total value for routine analysis in quality control and manufacturing settings.

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ZSX Primus 400

For large and heavy samples

Rigaku ZSX Primus 400 is a high-power tube-below WDXRF spectrometer engineered for the elemental analysis of large or heavy samples that are difficult to cut or resize.

Its expansive chamber accommodates specimens up to 400 mm in diameter, 50 mm thick, and 30 kg in weight, allowing direct measurement of bulky materials such as sputtering targets, magnetic disks, glass, and refractories.

With an r-θ mapping stage, high-resolution camera, and vacuum-controlled optics, the ZSX Primus 400 delivers reliable, high-precision results for large-scale industrial materials and research requiring uncompromised analytical accuracy.

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Supermini200

For compact, high-precision benchtop analysis

Rigaku Supermini200 is a high-performance benchtop WDXRF spectrometer that delivers laboratory-grade accuracy in a compact footprint.

Built on Rigaku’s proven technology, it offers precise quantitative analysis across the elemental range from O to Cm using a 200 W Pd X-ray tube.

With excellent sensitivity for light elements and no need for external cooling or high-power utilities, the Supermini200 provides a cost-effective and space-saving solution for routine and research applications.

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Simultix 15

For high-throughput multi-element analysis

Rigaku Simultix 15 is a high-performance simultaneous WDXRF spectrometer designed for rapid, precise multi-element analysis in demanding industrial environments.

With a powerful 4 kW X-ray tube and up to 40 fixed channels, it simultaneously measures multiple elements with exceptional precision and repeatability.

The robust optical system and advanced automation features ensure stable operation and consistent results, making the Simultix 15 ideal for steel, cement, glass, and other high-volume production applications.

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There are four factors to consider.

Optical system: Select according to the analysis application and sample type
Output: Select according to the required analysis accuracy and sensitivity for trace elements
Instrument size: Important when laboratory space is limited
Price: Always important

The optical system of a WDXRF is important to select according to the sample shape and analysis purpose.

Sequential-type systems move a goniometer to sequentially analyze multiple elements. They are suitable for qualitative analysis of unknown samples or for applications requiring a wide range of analytical capabilities.

On the other hand, simultaneous-type systems measure specific elements in dedicated channels at the same time, offering high-speed and high-precision quantitative analysis. They are particularly optimal for routine analysis of large sample volumes or continuous measurements in quality control lines.

Additionally, the X-ray irradiation method should be selected based on the type of sample. Tube-above is suitable for powdered samples (e.g., cement raw materials, catalyst powders, mineral samples) and does not risk contaminating the device even when the powder has poor formability. Tube-below is convenient for measuring liquids (e.g., aqueous solutions, oils) or metal plates, as the structure supporting the sample from below keeps the liquid surface flat, enabling stable analysis.

The output of the X-ray tube in WDXRF directly affects the sensitivity and measurement accuracy of the elements that can be analyzed.

High-output models (4 kW, 3 kW, etc.) are ideal for applications requiring high-precision composition control of major components to trace elements in materials such as steel, cement, and ceramics.

On the other hand, low-output models (200 W, 50 W etc.) feature energy-efficient and compact designs. They require less installation space and generally offer lower total ownership costs, including power consumption.

The device size varies depending on the output and optical system configuration.

High-output models are generally larger, but with the latest space-saving designs, efficient operation is possible even in limited laboratory spaces. It is important to choose a model that does not compromise on analytical performance while considering the installation environment.

If you're unsure

Finally, WDXRF cannot be selected based solely on simple specification comparisons. The optimal specifications vary depending on the application and sample. At Rigaku, we assist you in finding the optimal WDXRF for your needs through test measurements using representative samples and consultations with experts.

	ZSX Primus IV	ZSX Primus IVi	ZSX Primus 400	ZSX Primus III NEXT	Supermini200	Simultix 15
Core configuration	Sequential tube-above	Sequential tube-below	Sequential for large samples tube-below	Sequential tube-above	Benchtop sequential tube-below	Simultaneous tube-above
X-ray source and tube power	4 kW Rh	4 kW Rh	4 kW Rh	3 kW Rh	200 W Pd	4 kW Rh
Measurement element range	Be-Cm	Be-Cm	Be-Cm	Be-Cm	O-U	Up to 30 (standard) Be-U
Sample size (maximum)	φ52 mm × 30 mm (H)	φ52 mm × 40 mm (H)	φ400 mm × 50 mm (H)	φ52 mm × 30 mm (H)	φ52 mm × 33 mm (H)	φ52 mm × 30 mm (H)
Price	$$$$	$$$$	$$$$	$$$	$$	$$$$~$$$$$
Mapping measurement (option)	✓	✓	✓	-	-	-
Helium purge system	✓	✓	-	-	✓	-
Dimensions	1310 mm(W) × 980 mm(D) × 1465 mm(H)	840 mm(W) × 980 mm(D) × 1440 mm(H)	1370 mm(W) × 850 mm(D) × 1439 mm(H)	1310 mm(W) × 980 mm(D) × 1465 mm(H)	580 mm(W) × 680 mm(D) × 670 mm(H)	880 mm(W) × 1130 mm(D) × 1770 mm(H)
Recommended sample type	bulk, powder, liquid	bulk, powder, liquid	bulk, powder	bulk, powder	bulk, powder, liquid	bulk, powder