Micro-Z ULS

Designed for ultra-low level sulfur analysis of diesel, petrol (gasoline) and other fuels, the Rigaku Micro-Z ULS wavelength dispersive X-ray fluorescence (WDXRF) instrument features a novel design that measures both the sulfur peak and the back-ground intensity. The ability to measure and correct for changes in background intensity delivers a better net peak intensity measurement, resulting in superior calibrations and enhanced real world precision. Rigaku Micro-Z ULS complies with ASTM 2622-10, ISO 20884 and JIS K2541-7 methods.


  • Ultra-low sulfur analysis of diesel and gasoline
  • 0.3 ppm lower limit of detection (LLD)
  • No He(g) purge required
  • Easy-to-use benchtop analyzer
  • Complies with ASTM D2622-10
  • Complies with ISO 20884
  • Complies with JIS K2541-7
Superior optics for reliable sulfur analyses

The Rigaku Micro-Z ULS is the ideal solution for sulfur analysis of petroleum based fuels, with a lower limit of detection (LLD) of 0.3 ppm sulfur. Employing robust fixed optics in a vacuum environment, and featuring a specially designed doubly curved RX-9 analyzing crystal, the Micro Z ULS delivers consistent high sensitivity measurements.

ASTM D2622 performance for non-technical users

Specifically designed for non-technical users, all operations – from calibration through routine analysis – can be performed via the easy-to-use interface. And the analyzer can be powered by any standard “wall” AC outlet.



• Wavelength dispersive X-ray fluorescence analyzer

     – Includes vacuum pump

• Elemental range: sulfur (S), LLD = 0.3 ppm

• Application: analysis of fuels for sulfur content

• Single measurement position (std. 35 mm cup)

Supported methods

• ASTM D2622-10

• ISO 20884 and JIS K2541-7


• 40 kV Cr-anode X-ray tube

• 40 W max power


• Doubly curved RX-9 analyzing crystal

• Sealed proportional counter

• Fixed optics with switchable receiving slit

    – To select peak or background

• Pulse height analyzer (PHA)


• Sample analysis in air

• Optics are under vacuum

Environmental conditions

• Ambient temperatures 15 – 28°C

• Relative humidity <75% non condensing

• Vibration undetectable by human

• Free from corrosive gas, dust, and particles

Dimensions / power

• Analyzer: 450 x 410 x 440 mm, 36 kg

• Pump: 323 x 142 x 189 mm, 10 kg

• 100-120 VAC, 15 A or 200-240 VAC, 10 A


• Embedded dedicated processor

• Proprietary operating system


• Up to 10 calibrations

• Up to 30 standards per calibration

• Selectable analysis time (up to 900 s)

• Drift correction

• Pulse height analyzer (PHA) adjustment

User interface

• LCD display

• Embedded computer

• Membrane keypad and navigation


• Thermal dot printer

• RS-232C data output


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