Micro-Z ULSD Analyzer
High-precision analyzer for ultra-low sulfur diesel (ULSD).
- Highly accurate sulfur measurement (in ppm).
- Fast analysis with minimal sample preparation.
- User-friendly interface with comprehensive software.
- Robust and reliable for continuous operation.
- Compliant with ASTM and ISO standards.
Key Features
Micro-Z ULSD Analyzer is fully compliant with ASTM D2622, ASTM D7039, providing both standard method and refined methodology.
The Rigaku Micro-Z ULS is specifically designed for non-technical users, all operations – from calibration through routine analysis – can be performed via the easy-to-use interface. The analyzer can be powered by any standard “wall” AC outlet.
The Rigaku Micro-Z ULS is ideal as a benchtop instrument with unit dimensions of 450 x 410 x 440 mm and 18 x 16 x 17 inches
The Rigaku Micro-Z ULS uses a single measurement position (std. 35 mm cup) which translates to lower running and consumable costs for the lifetime of the unit.
The Rigaku Micro-Z ULS includes an external vacuum pump which aids in the consistent delivery of the high sensitivity measurements.Videos

Rigaku Micro-Z ULSD / Sulfur analyzer
Ultra-low sulfur.
Real-world precision.

A novel design for ultra-low level sulfur analysis
Designed for ultra-low level sulfur analysis of diesel, petrol (gasoline), and other fuels, the Rigaku Micro-Z ULSD sulfur analyzer and wavelength dispersive X-ray fluorescence (WDXRF) instrument features a novel design that measures both the sulfur peak and the background intensity.
Background correction
Measure the sulfur peak.
Correct the background.
A better net peak intensity measurement, from a single design decision.
The sulfur analyzer's ability to measure and correct for changes in background intensity delivers superior calibrations and enhanced real-world precision.
Lower limit of detection.
With a lower limit of detection (LLD) of 0.3 ppm S, the Rigaku Micro-Z ULSD sulfur analyzer complies with ASTM 2622-10, ISO 20884, and JIS K2541-7 methods.
Designed for
- Diesel
- Petrol (gasoline)
- Other fuels
Precision + Range
Fixed optics.
Switchable focus.
A 40 kV chromium-anode X-ray tube excites the sample at up to 40 W, read by a doubly curved RX-9 analyzing crystal and sealed proportional counter. Fixed optics with a switchable receiving slit select between peak and background, with samples analyzed in air while the optics themselves run under vacuum from an external pump. The analyzer uses a single measurement position with a standard 35 mm cup, keeping running and consumable costs low.
Built for non-technical operators.
Every step from calibration to routine analysis runs through the same on-board interface, powered by any standard wall AC outlet.
At a glance
- LCD display + membrane keypad
- Up to 10 calibrations, 30 standards each
- Selectable analysis time, up to 900 s
- Optional thermal dot printer
Description highlights
Superior calibrations.
Enhanced real-world precision.
- 01
Measurement Design
Measures both the sulfur peak and the background intensity.
- 02
Lower Limit of Detection
0.3 ppm S.
- 03
Methods
ASTM 2622-10, ISO 20884, and JIS K2541-7.
Specs
| Instrument | • Wavelength dispersive X-ray fluorescence analyzer – Includes vacuum pump • Elemental range: sulfur (S), LLD = 0.4 ppm • Application: analysis of fuels for sulfur content • Single measurement position (std. 35 mm cup) |
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| Supported methods | • ASTM D2622-10, • ISO 20884 and JIS K2541-7 |
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| Excitation | • 40 kV Cr-anode X-ray tube • 40 W max power |
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| Detection | • Doubly curved RX-9 analyzing crystal • Sealed proportional counter • Fixed optics with switchable receiving slit – To select peak or background • Pulse height analyzer (PHA |
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| Atmosphere | • Sample analysis in air • Optics are under vacuum |
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| Environmental conditions | • Ambient temperatures 15 – 28°C • Relative humidity <75% non condensing • Vibration undetectable by human • Free from corrosive gas, dust, and particles |
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| Computer | • Embedded dedicated processor • Proprietary operating system |
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| Software | • Up to 10 calibrations • Up to 30 standards per calibration • Selectable analysis time (up to 900 s) • Drift correction • Pulse height analyzer (PHA) adjustment |
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| Userinterface | • LCD display • Embedded computer • Membrane keypad and navigation |
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| Options | • Thermal dot printer | |
| Dimensions / Power | • Analyzer: 43x40x40 cm (17x16x16 inches) 50 kg (110) • Pump: 48x15x30 (19x6x12 inches) 23 kg (50 lbs) • 100-120 VAC, 15 A or 200-240 VAC, 10 A |

