- Measurement specific to Total Sulphur
No interference from other components - Wide range capability
Measures between 0-250ppb to 0-2000ppm - Low volume humidifier
Response times as low as 20 seconds - Single optical sensor
Eliminates temperature drift - No instrument air / N₂ required
Lowers running costs - Fibre optic link between housings
Reduces effects caused by ambient temperature swings - Up to 2 detection modules per controller
Minimises capital investment - Multi-streaming capability
Will control up to 2 streams with one controller
APPLICATIONS:
With its wide-ranging ability to measure Total Sulphur and/or H₂S
from % levels down to ppb levels, the TG400 range of Total Sulphur
process analysers can be utilised 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 sample is mixed with a continuous flowing stream of hydrogen.
The mixed gases are heated together in a reducing catalytic furnace at a
temperature between 650°C and 1200°C, depending on the application, where the sulphur compounds in the sample are converted to H2S.
Using the NOVASULFTM TG series colourimetric analyser, the resulting H2S is measured. Temperature (zero) drift is eliminated in this analyser by the use of a single optical sensor.
Since the patented catalytic element is self-regenerating and due to the high hydrogenation and cracking properties of this element, there is absolutely no need for manual or automatic regeneration of the furnace. No carbon build-up occurs in normal operation, even in the case of unsaturated hydrocarbon applications such as ethylene, propylene, butadiene, where full catalytic conversion can be achieved at 650°C, compared to 1200°C with a conventional thermal cracking conversion. This new concept of catalytic conversion, coupled with the field-proven, NOVASULF™ H2S analyser makes the TG SERIES the most state-of-the-art process Total Sulphur Analyser available today.
| SPECIFICATIONS | |
| ANALYSER: | |
| Measurement principle | Conversion of sulphur compounds to hydrogen sulphide (reduction in presence of hydrogen). Colorimetric (complies with ASTM D4045, D4084, D4323, D4468) |
| Software | C++ Windows XPe based, SIL 2 certified |
| Electronics | PC104, Intel Celeron 400MHZ microprocessor, 256Mb SDRAM, 512Mb compact flash for the operating system, application, customised parameters and calibration curves storage |
| Keypad | Accessible through flameproof box using Touchsense™ technology |
| Measurement range | 0-250 PPB/V up to 0-2000 PPM |
| Repeatability | ± 1.5% full scale |
| Drift | Zero |
| Multiplexing | Up to 2 detection modules on one controller |
| Output | 1 x 4-20mA per module (Modbus optional) |
| Alarms | 1 x measurement alarm, 1 x instrument failure alarm. Additional optional alarms available |
| Area classification | ATEX approved, Ex d [ia] IIC T4 |
| Ambient temperature limits | -20°C to +40°C |
| Tape life | Up to 60 days depending on the application. |
| Weather protection | IP66 |
| Response time | Depends on application but typically 20secs for 0-10ppm range |
| UTILITIES | |
| Power | 120 / 240 VAC 50 / 60 Hz |
| Power rating | 40 VA |
| Process sample | Max pressure 1.5 – 4.0 bar, flow rate 0.15 to 0.3 l/min, 40°C max temp |
| INSTALLATION | |
| Process connections | ⅛” OD inlet, ¼” NPT female vent (to atmospheric vent) |
| Analyser Vent | To Atmospheric, no back pressure or vacuum allowed |
| Weight | 30 Kg approx |
| Dimensions | 700(w), 1400(h), 300(d) mm |
| ORDERING INFORMATION: | |
| Application Range Process conditions Wall mounting or free standing frame Power supply |