Medor - Model Exd -Sulfur Compounds / Mercaptans / Odor Analyzers

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

Two versions exist :

• the MEDOR Exd ppm which measures at ppm levels
• the MEDOR Exd 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
• Inbuilt nitrogen generator for hazardous area from instrument air or from external compressor
• Liquid Injection valve for LPG or up to condensate analysis
• Sampling vavle for high concentration up to % level
• Internal temperature control system using electric heater / VORTEX / electric peltier cooler

• Speciation and/or total sulfur

Detection limits:

• MEDOR® Exd ppm:
• H2S: 0,1 ppm (0,14 mg/m3)
• MEDOR® Exd 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
• 128 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)

Power supply:

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

Electrical consumption:

• 150 VA without options

Dimensions and Weight:

• Height: 1900 mm
• Width: 800 mm
• Depth: 600 mm
• Net weight of analyzer without frame: 105 kg (175 kg with frame)