Chromatotec Group

- Model Exp - Sulfurs / Mercaptans / Odor Analyzer

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Sulfurs / Mercaptans / odor analyzer: MEDOR Exp Chromatotec has engineered and manufactured the new Exp Medor designed to operate in hazardous area environment such as Class I, Division 2, group C&D and ATEX zone I and II.

The MEDOR Exp is an automatic and isothermal gas chromatograph dedicated to sulfur compounds analysis (H2S, mercaptans and sulphides) in different matrices.

Two versions exist :

  • the MEDOR Exp ppm which measures at ppm levels
  • the MEDOR Exp ppb which measures at ppb levels.

  • Hazardous area Ex enclosure 
  • Internal temperature and pressure monitoring
  • Loop injection by automatic valve
  • Detection is made by a gas-liquid reaction
  • Sulfur specific detector – no interferencees
  • The detector life is in excess of 10 years

  • ASTM D7493-08 : Standard Test Method for Online Measurement of Sulfur Compounds in Natural Gas and gaseous Fuels
  • Fully automatic, continuous online analyzer in an Ex enclosure
  • Integrated industrial computer
  • Storage of date & time stamped chromatograms

Chromatotec developed software system enables :

  • Remote monitoring & injection control
  • Full traceability with on board archiving of results
  • QC Set up and control of threshold alarms
  • Export of data MODBUS / MGS1 / 4-20mA / 0-10V

  • External multiple stream selector (up to 16 streams controlled by the analyzer)
  • Calculation modules (Average / Statistics / Odor index...)
  • Electric selection valve to reduce air consumption
  • 24 V DC power supply, can work on battery or solar panel
  • Vortex cooler (air consumption depending of external t°)
  • X - Purge for Zone 1
  • Inert purge with N2 for low consumption of purge gas with Xpurge (can work on N2 cylinders)
  • Internal electric heater and/or cooler for temperature regulation of the Exp cabinet with thermal insulation

  • Speciation and/or total sulfur

Detection limits:

  • MEDOR® Exp ppm:
    • H2S: 0,1 ppm (0,14 mg/m3)
  • MEDOR® Exp ppb:
    • H2S: 5 ppb (7,0 μg/m3) or DMS: 2 ppb (5,1 μg/m3)

Range adjustable, depending on application:

  • 0/10 or 0/100 or 0/1000 ppm or ppb
  • Calculation: total sulfur, total mercaptans...

Relative Standard Deviation:

  • RSD < 3% on concentration over 48H.
  • RSD < 0.5% on retention time over 48H.

Cycle Time:

  • H2S 120 s
  • H2S/TOS/TS 120 s
  • THT 180s (if only THT)
  • H2S, MM, EM 300s
  • H2S, mercaptans, THT 720 s
  • H2S, mercaptans, THT 900 s with CALIB for validation of each analysis

Supervisor:

  • Embedd industrial computer Windows® based with LCD display
  • 32 GB of hardware storage on SSD memory

Communication:

  • MODBUS communication protocol
  • 4-20mA
  • Ethernet
  • 3G module (optional)

Gas supply for GC operation:

  • Carrier: zero air or N2 (3 bar): 4 ml/min. Use N2 if THT is present
  • CALIB: air or N2 50 ml/min
  • Sample inlet 1 bar: 80 ml/min
  • Pneumatic valve: 90 ml/commutation (0 ml in option)

Gas supply for Exp cabinet:

  • If air used for dilution: 30 l/min in continue
  • If nitrogen used for dilution: 500 l to purge the cabinet and
  • < 0,5 l/min in continue to maintain overpressure

Power supply:

  • Main: 230V / 115V or 50/60 Hz
  • 24 V DC in option

Electrical consumption:

  • 150 VA without options

Dimensions and Weight:

  • Height: 800 mm
  • Width: 600 mm
  • Depth: 300 mm
  • Net weight: 40 kg

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