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 principleDissolved H2S in liquids is stripped out with a nitrogen carrier gas and measurement made using colorimetric techniques
SoftwareC++ Windows XPe based
ElectronicsPC104, 512Mb compact flash for the operating system, application, customized parameters, and calibration curves storage
KeypadAccessible through flameproof box using Touchsense™ technology
Measurement rangeBetween 0-2ppm H₂S to 0-100% H₂S in liquid
Repeatability± 3% full scale
Output1 x 4-20mA per module (Modbus optional – RS485)
Alarms1 x measurement alarm, 1 x instrument failure alarm. Additional optional alarms available
Area classificationATEX approved,  Ex d [ia] IIC T4
Ambient temperature limits-2°C to +40°C, with ambient swings of 5°C maximum
Tape lifeUp to 40 days depending on the application.
Weather protectionIP66
Response timeDepends on the application between 30 secs to 8 minutes
UTILITIES
Power85 / 264 VAC   50 / 60 Hz
Power rating40 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 connections¼” NPT female vent (for sample in atmospheric vent)
Analyzer VentTo Atmospheric, no back pressure or vacuum allowed
Weight50 Kg approx
Dimensions800(w), 1700(h), 350(d) mm
ORDERING INFORMATION:
Application Range
Process conditions
Wall mounting or free-standing frame Power supply
 

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