HL400 Series H₂S in HC Liquids Analyser
- Measurement specific to H₂S
No interference from other components - Wide range capability
Measures between 0-2ppm H₂S to 0-100% H₂S - Low volume humidifier
Response times as low as 30 seconds - Single Optical Sensor
Eliminates temperature drift - Fiber optic link between housings
Reduces effects caused by ambient temperature swings - Up to 2 detection modules per controller
Minimizes capital investment
PRINCIPLE OF OPERATION
The measurement principle is based on a variation of HENRY’s law: the weight of any gas dissolved in a definite volume of liquid is directly proportional to the partial pressure the gas exerts above the liquid at a constant temperature.
The Analyser consists of a stripping system coupled with an H2S Analyser NOVASULFTM HG SERIES.
The liquid sample enters an insulated, heated sample handling cabinet and then passes through a pressure regulator to maintain a constant pressure for the liquid sample sweep. The sample feeds through a final filter which protects the metering pump. A metering pump continuously injects measured quantities of sample and is mixed with flowing nitrogen, at a constant and measured flow-rate, The blend then enters a vaporizer with an adjustable nozzle which sprays the blend into a glass chamber. This phenomenon causes the stripping of H2S into the nitrogen. The degassed liquid falls into a reservoir and then to the drain. At the same time, the nitrogen-containing H2S in proportion to that in the original liquid is piped directly to the NOVASULFTM HG SERIES H2S Analyser.
| SPECIFICATIONS | |
| ANALYSER: | |
| Measurement principle | Dissolved H2S in liquids is stripped out with a nitrogen carrier gas and measurement made using colorimetric techniques |
| Software | C++ Windows XPe based |
| Electronics | PC104, 512Mb compact flash for the operating system, application, customized parameters, and calibration curves storage |
| Keypad | Accessible through flameproof box using Touchsense™ technology |
| Measurement range | Between 0-2ppm H₂S to 0-100% H₂S in liquid |
| Repeatability | ± 3% full scale |
| Output | 1 x 4-20mA per module (Modbus optional – RS485) |
| 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 | -2°C to +40°C, with ambient swings of 5°C maximum |
| Tape life | Up to 40 days depending on the application. |
| Weather protection | IP66 |
| Response time | Depends on the application between 30 secs to 8 minutes |
| UTILITIES | |
| Power | 85 / 264 VAC 50 / 60 Hz |
| Power rating | 40 VA |
| Process sample Nitrogen | Max pressure 1.5 – 4.0 bar, flow rate 0.15 to0.3 l/min, 40°C max temp Pressure 0.5 to 1 l/min |
| INSTALLATION | |
| Process connections | ¼” NPT female vent (for sample in atmospheric vent) |
| Analyzer Vent | To Atmospheric, no back pressure or vacuum allowed |
| Weight | 50 Kg approx |
| Dimensions | 800(w), 1700(h), 350(d) mm |
| ORDERING INFORMATION: | |
| Application Range Process conditions Wall mounting or free-standing frame Power supply |