Total Sulphur Analysers

  • Measurement specific to total sulfur
    No interference from other components
  • Wide range capability
    Measures between 0-250ppb to 0-2000ppm
  • ATEX approved for hazardous areas
    Suitable for onshore and offshore applications
  • Hydrogen/process sample shut-down system
    Increased safety
  • Fibre optic link between housings
    Virtually eliminates drift
  • Self-regeneration of catalyst (optional)
    Increases instrument availability
  • Dual Stream capability
    Reduces capital costs

With its wide-ranging ability to measure Total Sulphur from % levels down to ppb levels, the TG500 range of Total Sulphur process analyzers can be utilized in many process industries, including Ethylene/Propylene plants Reformer recycle gas Offshore gas production Fuel gas monitoring Catalyst protection Sour gas treatment plants

The metered process gas is mixed with a continuous flowing stream of hydrogen. The mixed gases are heated together in a conversion furnace at a temperature between 650°C to 1050°C, where all the sulfur compounds are converted to H₂S. A catalyst is used for air conversion in some application (optional). The resulting H₂S is measured using interference-free ASTM approved colorimetric techniques. Since the patented catalytic element is self-regenerating, there is no need for manual or automatic regeneration of the furnace. The local LCD display provides the current H₂S / total S readings, alarms if any, and failure indicators.

Measurement principleConversion of sulfur compounds to H₂S and subsequent measurement of the H₂S using colorimetric techniques. Complies with ASTM D4468
SoftwareC++ Windows XPe based, SIL 2 certified
ElectronicsPC104, AMD Geode LX800 processor 500MHz performance, 256Mb SDRAM 512Mb industrial bootable compact flash card for the operating system, application, customized parameters, and calibration curves storage
KeypadAccessible through flameproof box using Touchsense™ technology
 Measurement rangeBetween 0-250ppb H₂S to 0-2000ppm total sulphur
Repeatability Output± 2% full scale
Alarms1 x 4-20mA per module, Modbus RS485, and TCP/IP, per stream 1 x measurement alarm, 1 x instrument failure alarm.
Area classificationATEX approved, II 2 (1) GD, Exd ia m [ia is op Ga] [Exia] IIC T4, Ex tD iaD [iaD] A21 IP66 T 135°C
EnclosureIP55 or IP66
Ambient temperature limit -20°C to +50°C
Tape lifeUp to 90 days depending on the application.
Response time Depends on the application but typically 20secs for 0-10ppm range
Auto Cal/ValOptional
Power115 / 230 VAC   50 / 60 Hz, 250VA (1000VA during start-up)
Process samplePressure 4.0-6.0 bar, flow rate 0.05 to 0.5 l/min
Hydrogen100-250 cc/min

 Nitrogen/Inst. Air

100-20 cc/min (for furnace regeneration)
Process connectionsNPTF: ⅛” reference, ¼ for process sample, air & N₂,  ½” vent (atmospheric)
Weight 150 Kg approx. (standard model)
Dimensions1100(w), 1700(h), 300(d) mm (standard model)
Process conditions
Wall mounting or free standing frame
Power supply

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