NovaSulf™ HG400 Series H₂S Analysers
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Measurement specific to H₂S
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No interference from other components
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Wide range capability
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Fully configurable between 0-50ppb to 0-100%
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Single point calibration
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Low operational costs
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Touch screen
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Eliminates the need to open the enclosure
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Different cell designs
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Maximises sensitivity and response times (as low as 10 secs)
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Optional alarm outputs
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Monitors low/high sample flow or paper break/motor failure
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Up to 4 detection modules per controller (low range only)
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Minimises capital investment
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Multi-streaming capability
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Will control up to 4 streams with one controller
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Compact Flash Card
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Allows for remote evaluation and diagnostics
APPLICATIONS:
With its wide-ranging ability to measure H₂S from % levels down to ppb levels, the HG400 range of H₂S process analysers can be utilised in many process industries, including: Natural gas pipelines Reformer recycle gas Gas processing Offshore gas production Fuel gas monitoring Biogas.
PRINCIPLE OF OPERATION
A reel of paper tape impregnated with lead acetate is exposed to the gaseous process sample in the sample chamber. Hydrogen sulphide (H₂S) in the process sample reacts with the lead acetate, after acidification, to form lead sulphide (PbS), a brown compound that stains the tape. The higher the concentration of H₂S the darker the stain. A focused LED and single photo detector measures the darkening stain and the analyser reports this as a 4-20mA output of the concentration of H₂S. Incremental measurements are made on the same spot until saturation occurs, when the tape is advanced to a fresh portion of tape. This avoids the need for frequent zero or span calibrations.
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