Chromatotec Group

- Model Exp - Sulphurs / Mercaptans / Odour Analyzer

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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

  • MODBUS or MSG1 communication protocol
  • Analog 4-20mA or 0-10V output
  • Ethernet
  • Automatic calibration using internal permeation tube (Standard with MEDOR® Exp ppb model).
  • Calculations (average) and alarms module
  • Vortex air conditioning

  • Reduced sulphur compounds analysis: Speciation or total sulphur.
  • Detection limits:
    •  MEDOR® Exp ppm:
    •  H2S: 0,1 ppm (0,1417 mg/m3)
    •  MEDOR® Exp ppb:
    •  H2S: 5 ppb (7,0 µg/m3)
    •  DMS: 2 ppb (5,1 µg/m3)
  • Range:
    •  0/10 or 0/100 or 0/1000 ppm
    •  ppb range on request
  • Relative Standard Deviation:
    •  RSD < 3% on concentration over 48H.
    •  RSD < 0.6% on retention time over 48H.
  • Data Management:
    •  Hard drive storage of date & time stamped chromatograms
    •  MODBUS communication protocol (optional)
    •  4-20mA (optional)
  • Cycle Time:
    •  H2S/MeSH 90s
    •  THT 180s (if only THT)
    •  H2S, mercaptans 300s
    •  Total reduced sulphur 120s
    •  H2S, mercaptans, THT 1200s
  • Gas supply:
    •  Carrier: Dry air or N2 (3 bars): 12 ml/min (N2 at 20 ml/min. if only THT)
    •  Use N2 if THT is present
    •  Z-purge: air 53 l/min
    •  CALIB: air or N2 50 ml/min
    •  Sample inlet 1 bar
  • Power supply:
    •  Main: 230V / 115V or 50/60 Hz
    •  Mean: 150 VA
    •  Battery 24V (optional)
  • Dimensions and Weight:
    •  Height: 800 mm
    •  Width: 600 mm
    •  Depth: 300 mm
    •  Net weight: 40 kg

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