Online analysis and monitoring of sulfur compounds in natural gas and gaseous fuels

  • Model: energyMEDOR®
  • Manufacturer: Chromatotec

The energyMEDOR® is an autoGC-ED (MEDOR® Electrochemical wet cell Detector) for the analysis and monitoring of sulfur compounds in natural gas and gaseous fuels: H2S, Mercaptans, Sulfides.

  • Impurities detection in Natural Gas / LPG / Propane / Butane
  • Deodorisation control ppb
  • Propellant gas
  • Catalyzer protection
  • Natural gas or LPG odorisation control ppm
  • Petrochemical
  • Gas transportation
  • Process
  • Fiscal metering station

The energyMEDOR® is an autoGC-ED (MEDOR® Electrochemical wet cell Detector) for the analysis and monitoring of sulfur compounds in natural gas and gaseous fuels: H2S, Mercaptans, Sulfides. Two versions exist:

  • The energyMEDOR® ppm (which measures at ppm levels)
  • The energyMEDOR® ppb (which measures at ppb levels)


The energyMEDOR is the fully automated Gas Chromatograph for sulfur monitoring. With only a need for nitrogen carrier gas and standard electrical power, installation can be made into your current monitoring enclosure or installed in a standalone system.The energyMEDOR is equipped with two columns, heated in isothermal oven with a preset temperature of 45°C, a 10-ports pneumatic valve, electrochemical detector and an internal permeation standard or external cylinder to validate your results.The energyMEDOR automatically samples the NG from the pipeline continuously in low volume, the NG travels through a loop, the loop is injected onto the chromatographic columns where the sulfurs are separated, after the columns the sample is detected on the electrochemical detector without additional conversion or sample manipulation. Following the detection of the compounds the onboard system processes the data and provides the operator with data in either analog or digital formats. In addition the operator can review all data with the software installed into the energy MEDOR.

Key points

  • 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
  • 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 wet cell 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
    • No cylinders required thanks to internal calibration tube
  • Automatic control with process device
  • Intelligence system with tunable and interactive alarms levels
  • Powerfull 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

Available options

  • 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
  • Internal calibration and validation system with permeation tube
  • Multiple stream selector (up to 16 streams with one analyzer)
  • Calculation modules (Average / Statistics / Odor index…)
  • Automatic data transfert through: Module for 4 outputs 4-20mA (with 0 mA for instrument default / 0-10 V / Modbus RTU or TCP IP
  • Electric selection valve to reduce air consumption
  • 24 V DC power supply
  • Nitrogen generator for safe or hazardous area

Feature Description
Detection limits
– H2S 0.1 ppm (0.1417 mg/m3), mercaptan: 0.1 ppm
– H2S 5 ppb (7.0 µg/m3), mercaptan: 5 ppb
Detection range 0/10 or 0/100 or 0/1000 (ppb or ppm)
Relative Standard Deviation
– RSD < 3% On concentration over 48 hours
– RSD < 0.5% On retention time over 48 hours
– Embedded Windows® based computer with LCD display
– 32 GB of Hardware storage on SSD memory
– MODBUS protocol included in standard
Cycle time
– H2S/MM/EM 300 seconds
– H2S, mercaptan 1, THT 720 seconds
– H2Sn, mercaptan 1, THT 900 seconds
– H2S, mercaptan 2, THT 1200 seconds
Linearity R² > 0.995 for all compounds
Gas supply
– Carrier: Dry air or N2 (3 bar): < 4 ml/min Use N2 if THT is present
– Internal calibration: 50 ml/min for ppm range
– Sample inlet 1 bar
– Pneumatic valve 90 ml/commutation




Case study energyMEDOR


Product reviews

Review energyMEDOR

5 0% | 0 review
4 0% | 0 review
3 0% | 0 review
2 0% | 0 review
1 0% | 0 review
Review energyMEDOR
Choose a image
0 character ( Minimum of 10)

    There are no reviews yet.

    No comments yet

    Related products



    Advanced Thermal Desorption Spectrometry Systems
    Find out more
    máy quang trắc ngọn lửa xung

    Pulsed Flame Photometric Detector (PFPD)

    Pulsed Flame Photometric Detector
    Find out more
    Máy đo độ đục để bàn Turb 750 T

    Turb 750 T Benchtop Turbidimeter

    Simplify turbidity measurements without compromising data quality
    Find out more
    Hệ thống phân tích dòng chảy liên tục

    Flow Solution FS3700

    Continuous Flow Analyzer
    Find out more
    máy đo màu cod 910

    910 COD Colorimeter

    Single Parameter Colorimeter for COD
    Find out more
    máy đo màu clo 900

    900 Chlorine Colorimeter

    Single Parameter Colorimeter for Total and Free Chlorine
    Find out more
    máy đo màu cầm tay


    pHotoFlex Colorimeters
    Find out more
    máy quang phổ 9800

    9800 Photometer

    Portable & Multiparameter Photometer for Water Quality Testing
    Find out more

    Subscribe to Content

    If you need to copy the content, please leave your information, and we will respond as soon as possible. Sincerely, thank you!