X-ray Fluorescence Sulfur-in-Oil Analyzer

Safer, Simpler and Swift: Effortless Sulfur Analysis in Oil

  • Ultra-low Detection Limit: It measures sulfur concentrations of 20 ppm or less, and can measure higher sulfur concentrations of crude and shale oil markets, up to 9.9999 wt%.
  • Portability at Its Best: Take it anywhere with ease – only 9 kg weight with small footprint.
  • Enhanced Safety: In addition to the thorough X-ray leakage test performed at the factory, the key switch and shield shutter provide additional protection for the operator.
  • Simple Operation: After selecting the calibration curves and measurement conditions, or selecting the correct calibration curve using the “A” mode, simply press the “MEAS” button to start the measurement.


Measurable Oils
Petroleum products such as heavy oil, naphtha, crude oil, shale oil and diesel oil.

Compliant with Standards
ASTM D4294, ISO 8754, JIS K2541/B7995

IMO’s 2020 GLOBAL SULFUR CAP Compliant
Read Application Note

Manufacturing CompanyHORIBA, Ltd.

Where can it be installed?

The SLFA-60 is a compact sulfur-in-oil analyzer based on energy-dispersive X-ray fluorescence (EDXRF) technology. It is portable and can be used on-board, thanks to its pump-free and LN2-free optics. The SLFA-60 series does not require a laptop or external printer, making it flexible to install in any location.

(Left) Placing a sample cell on the measurement position  (Right) Light weight and portable


How can I get data without operational computer and printer?

The SLFA-60 has an integrated large-screen display and touch buttons on the main unit, which makes it easier for users to operate the device intuitively. The buttons are covered with a resin sheet to prevent oil from adhering to the device and make it easier to keep it clean. The SLFA-60 also has an integrated printer that can print out all the necessary information on 80 mm wide paper.


How does it protect the device from oil leakage accident?

The SLFA-60 has a protective membrane under the sample cell. It protects the optics (detector and X-ray tube) from accidental sample leakage. The protective membrane is a single unit that is easy for the user to replace.


Is it safe from X-ray exposure?

The SLFA-60 has a two-tier safety system to prevent X-ray leakage: an X-ray shield, an interlock function, and a shutter function. The X-ray shield blocks X-rays from escaping the instrument. The interlock function prevents the X-ray tube from operating if the chamber lid is open. The shutter function closes over the X-ray port once the chamber lid is open, further preventing X-ray leakage. The SLFA-60 meets the requirements of IEC 61010-1, which specifies that the X-ray leakage rate must be under 5 µSv per hour. The SLFA-60 goes even further, with a design specification of under 1 µSv per hour. This means that the SLFA-60 is one of the safest X-ray fluorescence analyzers on the market.

Measurement Principle Energy Dispersive X-ray Fluorescence Analysis Method (EDXRF)
Measurement Sample Sulfur in Petroleum products such as heavy oil, naphtha, and crude oil, light oil
Measurement Range 0 – 9.9999 %
Repeatability 15 ppm or less (with a 1 % sulfur sample)
C/H Error Correction ± 50 ppm or less per C/H (with a 1 % sulfur sample)
Lower Detection Limit 20 ppm or less (three times the standard deviation with a 0 % sample)
Number of Calibration Curves 5 lines × 3 sets (Total 15 lines)
Calibration Curve Order Linear or quadratic (both automatic selection and manual settings available)
Calibration Calibration made using calibration points: (5 – 20 points)
Sample Requirement 4 – 10 mL
Measurement Time 10 – 600 sec
Spectrum Measurement Energy Axis: 0 – 10 keV, spectrum analysis to verify instrument performances.
External Output USB connection with PC, USB memory

Ambient Conditions

Temperature + 5°C ~ + 40°C (+ 41°F ~ + 104°F)
Humidity 80% max relative humidity in temperature range + 5°C ~ + 30°C (+ 41°F ~ + 86°F).
Linear decrease to 50% relative humidity in temperature range + 31°C ~ + 40°C (+ 88°F ~ + 104°F).

Power and Housing

Power Supply AC 100 – 240 V ± 10 %, 50/60 Hz
Power Consumption 80 VA
Dimensions [W x D x H] 230 x 400 x 140 mm (9 x 15.75 x 5.5 in.)
Weight 9 kg (20 lbs.)
Cooling system Air-cooling

Conformity Standards

ASTM D4294 (USA) · ISO 8754 · JIS K2541/B7995


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