THT MEDOR

Online analysis & control of gas odorisation

  • Model: THT MEDOR®
  • Manufacturer: Chromatotec

THT MEDOR® is an autoGC-ED (MEDOR® Electrochemical wet cell Detector) for the analysis and monitoring of THT and TBM in natural gas and gaseous fuels.

Applications:

  • Continuous monitoring of THT levels in natural gas
  • Automatic THT injection level control
  • User definable alarm thresholds
  • Multiple stream analysis (Upstream / downstream)
  • ppb level analysis (Detection limit: 5 ppb THT)
  • Automatic alarm generation
  • Catalyser protection
Category:

Principle:

  • Automatic sampling using a loop
  • Automatic loop injection on packed column
  • Isothermal gas chromatograph
  • Detection of THT and TBM eluting from the column performed by MEDOR®
  • Detector:Electrochemical wet cell Detector which is SSD Sulfur Specific Detector.
  • Signal provided by reaction between the wet cell electrolyte and the sulfur compounds

KeyPoints:

  • Fully compliant with ASTM D 7493-22 : Standard Test Method for Online Measurement of Sulfur Compounds in Natural Gas and Gaseous Fuels by Gas Chromatograph and Electrochemical Detection.
  • Automatic calibration/validation of the data, with embeded permeation tube
  • Continuous monitoring with automatic online sampling
  • Analytical performances:
    • Specific, linear and very sensitive to sulfur compounds
    • Results validation by automatic standard injection
    • Long term stability using detector installed in reservoir
  • Extremely low maintenance:
    • Very long life time detector with electrolyte, up to 10 years
    • Low gas consumption, can be reduced in option
    • More than 10 years data storage : full chromatogram
    • No cylinders required thanks to internal calibration tube and gas generators
  • Automatic control with process device
  • Intelligents system with tunable and interactive alarm levels
  • Powerful VISTACHROM Chromatotec® software: Remote monitoring & injection control
    • Full traceability with on board archiving of results and chromatograms
    • QC Set up and control of threshold alarms
    • Data export by MODBUS / 4-20 mA / 0-10 V
    • Time stamp results

Options:

  • Multiple stream selector (up to 32 streams with one analyser)
  • Explosion proof version Exp or Exd for ATEX, IECEx zone 1 and 2 group IIC T4 and also for CSA C1D2 group B , C & D T4
  • Calculation modules (Average / Statistics / Odor index and more)
  • Automatic data transfert through: Module for 4 outputs 4-20 mA (with 0 mA for instrument default) / 0 – 10 V / MODBUS RTU or TCPI IP or MGS1
  • Nitrogen or air generator for safe and hasardous area
  • 24 V DC power supply
  • Electric selection valve to reduce air consumption
  • Liquid injection valve from LPG up to condensates
  • High concentration injection valve up to 5%
  • Wall mounted box XXX934
  • Liquid injection valve for LPG analysis
  • Touch screen on the front panel for Exp version (only ATEX)
  • External cylinder inlet for automatic calibration from external cylinder
  • MFC for multipoint calibration from internal CALIB and/or from cylinder
  • Zero method
Compounds Analysed: • THT – TetraHydroThiophene and TBM Ter Buthyl Mercaptan
Detection Limit: • ppm Model – 1 mg/m3
• ppb Model – 0.3 mg/m3
Detection Range: • ppm model – 1 to 50 mg/m3
• ppb model – 0.3 to 3.0mg/ m3
(Ranges adjustable depending on Application)
Relative Standard Deviation: • RSD < 2 % on concentration over 48H
• RSD < 0.6% on retention time over 48H
Cycle Time: • THT and TBM 180s (for one stream)
• THT and TBM 240s to 300s (for multi stream)
Supervisor: • Embeded computer Windows® based with LCD display
• 128 GB of Hardware storage on SSD memory
Linearity: • > 0.995 for all compounds
Communication: • MODBUS RTU included in standard
• Ethernet, remote control
Gas supply: • Carrier Gas: N2 (3 bars): 10 ml/min
• Internal calibration: 50 ml/min (if selected)
• Sample inlet 1 bar (160 ml/min)
• Pneumatic valve 90 ml/commutation
Power supply: • Main: 230V / 60Hz or 115V / 50Hz
• In case of power loss, the isntrument will restart automatically
Electrical consumption: • Mean: 150 VA
Dimensions and weight: • Rack: 19’’ – (5U)
• Height: 222mm
• Width: 482mm
• Depth: 600mm
• Net weight: 22Kg
  Exp version:
• Height: 800mm
• Width: 600mm
• Depth: 320mm
• Net weight: 40Kg
To order:
Model:
THT MEDOR® inbuilt computer – 5U

THT MEDOR Exp ATEX Z2

THT MEDOR Exp ATEX/IECEx

THT MEDOR Exd ATEX Z1

THT MEDOR Exd IECEx Z1

 

M31022

M31022-ATEX-Z2

M31022-ATEX-Z1

M31022-ATEX-Z1-Exd

M31022-IECEx-Z1-Exd

TSP THT MEDOR

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