ATOM SLA-1000 Sulfur in Liquids Analyzer for Total Sulfur

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ATOM Instrument offers the most versatile Total Sulfur analyzers available.

The ATOM SLA-1000 is an online process analyzer utilizing patented Excimer UV Fluorescence (EUVF) technology to measure Total Sulfur in a variety of refinery process applications.

The ATOM SLA-1000 has the fastest analysis time of any commercially available analyzer allowing user-defined, multiple cycle averaging to improve analyzer performance The analyzer has a very fast response time to process changes (within 1 cycle), insuring proper process monitoring with fast moving processes.

The sample injection system design is simplified resulting in greater reliability and lower maintenance. For example, the sample valve only actuates once per cycle increasing valve lifetime. The analyzer results are insensitive to buildup of unvaporized sample residue and interference from oxygenates that may present in the sample stream. Finally, the ATOM SLA-1000 only requires bottled air (with no supplemental carrier gas) for normal operation and does not require installation in an enclosed shelter.

Performance Graphs

Typical Applications for SLA-1000:

  • Diesel (including ULSD)
  • Gasoline (including Tier-III)
  • Reforming and Isomerization
  • Other Refinery Grade Fuels
  • Blending Operations
  • Catalyst Protection
  • Natural Gasoline


Key Features
  • Accurate Low-Level Sulfur Measurement (< 1ppm)
  • Meets ASTM D5453 Performance Criteria
  • Built-in Density Correction
  • Dual Stream Capability
  • Measurement Range up to 10% Total Sulfur
  • Optimized Combustion Tube to Ensure Complete Oxidation
  • Sample Injection System Designed to Minimize Routine Maintenance
  • Outstanding Repeatability :
    • 200ppb SD or ±2% of measured value
    • 100ppb SD with 5-min averaging or ±2% of measured value
  • High Linearity :
    • ±2% of full scale (Dynamic Range Dependent)
Excimer UV Fluorescence

The Model SLA-1000 is based on field proven EUVF technology that is exceptionally stable and utilizes an excitation wavelength that achieves high detection sensitivity. The SLA-1000 is an excellent fit for applications in the 0-10 ppm range such as Tier 3 Gasoline and ULSD samples along with other applications containing up to 10% total sulfur. In addition, ATOM’s Excimer UV Fluorescence technology provides little to no Nitrogen interference when compared to other UVF technologies. The SLA-1000 is designed for outdoor installation and use in harsh environments as may be required by applications within the petroleum and petrochemical industries.

Graphical User Interface

The SLA software incorporates a user-friendly Graphical User Interface (GUI) designed to be both intuitive and easy to use. All aspects of analyzer operation are accessible from the Main toolbar utilizing drop down menu screens. The home screen displays 3 user selectable digital readout and analog bar graphs updated in real-time from the analysis. Run Cycle Status and current timed events are also refreshed in real-time. Major system control elements are also incorporated in this home screen. The calibrate menu allows complete control of the calibration and validation processes, including manual or auto calibration and validation sequencing. Analytical results acquired during calibration events may be inspected at any time prior to any subsequent calibration.

All other menu screens such as Timed Events, Detector, Analog Output, Digital I/O and System Alarm Settings, allow the user to easily monitor or make changes to all aspects of analyzer control and operation. The GUI software also includes user setup and password security, as well as plotting of real-time analysis data and historical settings.

Analyzer Response

The ATOM SLA-1000 is specifically designed for high speed analysis and a fast response time. This feature enables more rapid, real-time measurements to be performed, allowing process events and changes to be monitored and quantified in a timely manner. Process variations and detail potentially obscured with slower responding analyzers, may be revealed or become more apparent. The cycle time is completely user selectable although a 100-second cycle time is standard.