For Industrial Applications Requiring Total Sulfur – Nitrogen Monitoring

• Excimer UV Fluorescence (EUVF) Technology provides Low Range
• Simplified Design Improves Certification and Process Monitoring
• Low Concentration Total Sulfur Analysis (<1 PPM)
• High Speed Analysis and Response Time
• User Defined Data Averaging
• Low Utility Consumption
• Compact Instrument Footprint
• Does not Require Installation in Shelter

SIMPLIFIED DESIGN IMPROVES CERTIFICATION AND PROCESS MONITORING

The SGA-1000 total sulfur measurement provides a complete analysis of all sulfur compounds potentially present in process gas streams and not just a few selected sulfur compounds as with some GC/TDL applications. Calibration and Validation is seamlessly incorporated with an optional calibration switching configuration and associated software for easy compliance or verification testing.

PRINCIPLE OF OPERATION

One of the most simple and practical low-level sulfur analytical techniques that have been widely used and proven over many years of industrial utilization is the UV Fluorescence method (UVF). The UV Fluorescence method involves the injection of a sample into high-temperature oxidation or combustion furnace, which converts all hydrocarbons into water (H₂O) and carbon dioxide (CO₂) byproducts. Total sulfur content contained in any molecular-bound hydrocarbon species is similarly oxidized at temperatures in excess of 1000oC into sulfur dioxide (SO₂)
by the reaction:  R-SH + O₂ → SO₂ + CO₂ + H₂O

The furnace effluent containing these combustion byproducts is directed into a detection chamber where it is excited by high-energy, short-wavelength emission from a UV excitation source. The UV photons from the excitation source or lamp transfers energy into the SO2 molecule and raise its energy level to create an excited singlet state. These excited molecules rapidly decay back to their lower energy ground state releasing the absorbed energy as a secondary emission known as fluorescence.   SO₂ + hv → SO₂^* → SO₂ + hv’

This low-level fluorescence emission is optically filtered to remove undesired wavelengths of the UV source and background scatter within the detector chamber. Detection of the filtered fluorescence emission is usually accomplished with a Photomultiplier Tube (PMT), Channel-Plate Multiplier (CPM) or other high gain, light-sensitive detector.

GRAPHICAL USER INTERFACE (GUI)

The SGA-1000 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 refreshed moment by moment. 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.

REMOTE ACCESS

The Analyzer Central Communication Ethernet Server Software allows an authorized user to access any ATOM analyzer on the facility network from an internal office or workstation. After a successful security login, the network will initiate communication to the selected instrument of choice. Once connected, the instrument can be operated and interfaced with just as if the user was standing directly in front of the instrument. Instead of utilizing the analyzer touch screen, the remote connection keyboard and mouse are used for all interface requirements.