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
APPLICATIONS:
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
PRINCIPLE OF OPERATION
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.
| SPECIFICATIONS ANALYSER: | |
| Measurement principle | Conversion of sulfur compounds to H₂S and subsequent measurement of the H₂S using colorimetric techniques. Complies with ASTM D4468 |
| Software | C++ Windows XPe based, SIL 2 certified |
| Electronics | PC104, 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 |
| Keypad | Accessible through flameproof box using Touchsense™ technology |
| Measurement range | Between 0-250ppb H₂S to 0-2000ppm total sulphur |
| Repeatability Output | ± 2% full scale |
| Alarms | 1 x 4-20mA per module, Modbus RS485, and TCP/IP, per stream 1 x measurement alarm, 1 x instrument failure alarm. |
| Area classification | ATEX approved, II 2 (1) GD, Exd ia m [ia is op Ga] [Exia] IIC T4, Ex tD iaD [iaD] A21 IP66 T 135°C |
| Enclosure | IP55 or IP66 |
| Ambient temperature limit | -20°C to +50°C |
| Tape life | Up to 90 days depending on the application. |
| Response time | Depends on the application but typically 20secs for 0-10ppm range |
| Auto Cal/Val | Optional |
| UTILITIES | |
| Power | 115 / 230 VAC 50 / 60 Hz, 250VA (1000VA during start-up) |
| Process sample | Pressure 4.0-6.0 bar, flow rate 0.05 to 0.5 l/min |
| Hydrogen | 100-250 cc/min |
Nitrogen/Inst. Air | 100-20 cc/min (for furnace regeneration) |
| INSTALLATION | |
| Process connections | NPTF: ⅛” reference, ¼ for process sample, air & N₂, ½” vent (atmospheric) |
| Weight | 150 Kg approx. (standard model) |
| Dimensions | 1100(w), 1700(h), 300(d) mm (standard model) |
| ORDERING INFORMATION: | |
| Application Range Process conditions Wall mounting or free standing frame Power supply |