GC chromatograph THT MEDOR®

gasfor gas analysisprocess

Technical specifications

• Detection limits:
  
  • 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 3.0 mg/m3 (ranges adjustable depending on application)
• Relative Standard Deviation:
  
  • RSD < 2 % on concentration over 48H
  • RSD < 0.6% on retention time over 48H
• Results & computing:
  
  • Embedded Windows® computer with LCD display
  • 128 GB SSD on-board storage
• Linearity:
  
  • 0.995 for all compounds
• Cycle time:
  
  • THT and TBM 180 s (single stream)
  • THT and TBM 240–300 s (multi-stream)
• Gas supply:
  
  • Carrier gas: N2 at 3 bar — 10 ml/min
  • Internal calibration (optional): 50 ml/min
  • Sample inlet: 1 bar — 160 ml/min
  • Pneumatic valve consumption: 90 ml per commutation

Odor measurement (THT)
Online analysis and control of gas odorisation using specific THT monitoring.

Description
THT MEDOR® is an online gas chromatograph designed for continuous measurement of THT in various gas matrices. It provides automated sampling, internal validation and remote data access for industrial odorising control.

Versions

• THT MEDOR® ppm — measurement at ppm levels
• THT MEDOR® ppb — measurement at ppb levels

Principle

• Internal pressure and temperature monitoring
• Automatic sample loop injection via valve
• Detection by sulphur-specific electrochemical cell for THT

Features

• Online, continuous sampling suitable for process control
• Minimal interference from other compounds
• Low maintenance — detector life up to 10 years
• Automatic validation of results with internal permeation tube
• Configurable threshold alarms (high / low) for odorising processes

VISTACHROM ® software
Chromatotec-developed software enables:

• Remote monitoring and injection control
• On-board archiving for full traceability of results
• QC setup and alarm threshold management
• Data export: MODBUS / MGS1 / 4-20 mA / 0-10 V

Standards, approvals & certifications

• ASTM
• ATEX and IECEx Zone 1 Group IIC T4

Technical characteristics (summary)

• Detector: sulphur-specific electrochemical cell for THT
• Detection limits: ppm model 1 mg/m3; ppb model 0.3 mg/m3
• Detection range: ppm 1–50 mg/m3; ppb 0.3–3.0 mg/m3 (adjustable)
• RSD: <2% (concentration, 48 h); <0.6% (retention time, 48 h)
• Embedded Windows® computer with LCD; 128 GB SSD
• Linearity: 0.995 for all compounds
• Cycle time: 180 s (single stream); 240–300 s (multi-stream)
• Carrier gas: N2 at 3 bar, 10 ml/min
• Internal calibration flow: 50 ml/min (optional)
• Sample inlet: 1 bar, 160 ml/min
• Pneumatic valve consumption: 90 ml per commutation
• Automatic validation via internal permeation tube
• Modifiable alarm thresholds and continuous online sampling