The sample is precisely metered in a continuous flowing stream of hydrogen. Both sample and hydrogen are heated together in a furnace at a temperature between 650°C and 1200°C (depending on the sample composition) where hydrogasification and catalytic hydrogenation transform sulphur compounds into H2S and reaction gas product.
For heavy or unsaturated hydrocarbons, the furnace includes a propriety catalytic element to achieve 100% conversion and prevents the reaction tube from clogging, fouling, and carbon build-up.
The resulting H2S is monitored by the interference-free, lead acetate tape, detection technology coupled with microprocessor-based electronics to provide fast and accurate measurement of total sulfur in liquid, gaseous, and LPG laboratory applications.
The analyser is sensitive to extremely low total sulphur concentrations (less than 10 PPB) as well as to high concentrations (up to 2000 PPM).

 Motorized syringe drive Model for liquid/gas sample injection.
 Patented catalytic element for heavy or unsaturated hydrocarbon applications.
 Gas / Liquid syringes

– PrincipleConversion of sulfur compounds in Hydrogen sulfide (reduction in the presence of Hydrogen)  and detection of the resulting H2S  by colorimetry  (speed of coloration of a lead acetate impregnated tape).
– Applications– Gaseous Hydrocarbons
– Liquid Hydrocarbons up to C25.
– DetectorSingle photodetector acting as measure and reference.
– Measuring methodASTM D 4468 for gases, D 4045 for liquids.
– Rangeability0-20 PPB up to 0-2000 PPM (with several different calibrations to be done by client).
– Range unitPPB, PPM, mg/Nm3, selectable.
– Lowest detectable limitBetween 5 and 50 PPB, depending on the application.
– Linearity± 0,5% of the calibration full scale.
– Reproducibility± 1% of calibration full scale.
– Accuracy± 1% of calibration full scale.
– Response timeTypically 9 min. for low range and 3 min. for high range.
– Zero driftNone due to the single photo-detector technique.
– Power supply110/220 V – 50/60 Hz – +/- 10 %.
– Power consumption1000 VA.
– RFI protectionIEC 8013 level 3 (CE Mark).
– Analog outputOption 4-20 mA isolated, 600 ohms max, loop load.
– Digital outputOptions up to 8 relays Modbus TCPIp and RS 485.
– CommunicationModbus TCPIp and RS 485, embedded server
– Calibration librariesIncluded, calibrations to be made by the client. The instrument is calibrated only up to 4 different ranges.
– Conversion furnaceFilament coil up to 1200°C.
– Reaction tubeQuartz up to 1100°C / Ceramic above 1100°C.
– Type of conversionPyrolysis or catalytic depending on the application (catalytic element optional).
– Conversion furnace temperature.Adjustable between 600 and 1200°C.
– Sensing tapeLead acetate impregnated, 60 meters roll.
– Tape lifeBetween 30 and 90 days (adjustable) in continuous operation.
– Storage life5 years for the sensing tape.
– Humidifier5 % acetic acid in distilled water 5 to 15 cc per week consumption.
– Sample inlet pressure(gas)7 bar max.
– Sample flowrate (gas)2 up to 200 cc/min adjustable (depending on the range).
– Liquid sample injectionWith motorized syringe drive (optional).
– Hydrogen inlet pressure7 bar max.
– Hydrogen flowrate200 up to 500 cc/min adjustable. Sulfur free.
– Nitrogen inlet pressure7 bar max.
– Nitrogen flowrate200 cc/min during the regeneration cycle only industrial grade.
– Instrument Air inlet pressure7 bar max.
– Instrument Air flowrate200 cc/min during the regeneration cycle only.
– Manual Regeneration systemIn case of excess samples without H2  in the furnace, carbon build-up appears in the reaction tube affecting the accuracy of the analysis.
– Working temperature20°C +/- 2°C.
– Storage temperature lab-15°C up to 55°C – 95 % R.H.
– Required bench sizesL1500 x D700 mm.
– Total weight60 kg without options.

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