GC chromatograph H2S MEDOR®

gasfor gas analysisindustrial gas

Overview
Online gas chromatograph analyser for continuous measurement of hydrogen sulfide (H2S) and other sulfur compounds in industrial and environmental gas streams. Available in ppm and ppb configurations for trace and routine monitoring.

Technical specifications

• Detection limits: H2S down to 0.1 ppm (0.1417 mg/m3); alternative ppb configuration
• Measurement ranges: selectable 0/10, 0/100, 0/1000 (ppb or ppm); % range with internal loop valve
• Repeatability/Stability: RSD ≤ 5% on concentration (24 h); RSD ≤ 1% and SD < 1 s on retention time (24 h)
• Linearity: > 0.995
• Cycle time: 120 s (0–3 ppm); 300 s (higher ranges)
• Electronics: Windows®-based embedded computer with LCD, 128 GB SSD; MODBUS RTU standard, Ethernet remote control
• Gas supply / Pneumatics: carrier dry air or N2 (3 bar) <4 ml/min; internal calibration 50 ml/min (ppm range); sample inlet 1 bar, sample flow 160 ml/min; pneumatic valve 90 ml per commutation
• Versions: H2S MEDOR® ppm and H2S MEDOR® ppb

Hydrogen sulfide
Analyzer dedicated to continuous on-line monitoring of hydrogen sulfide (H2S) in various matrices.

Description
H2S MEDOR® is an online gas chromatograph designed for the analysis of H2S. Two instrument configurations cover ppm and ppb measurement levels.

Principle

• Internal pressure and temperature monitoring
• Automatic sample loop injection by valve
• Sulfur-specific electrochemical cell used for H2S detection

Features

• Online continuous sampling and analysis
• Minimal interference from other compounds
• Low maintenance detector with long service life (up to 10 years)
• Automatic result validation via internal permeation tube
• Configurable alarm thresholds (high/low) for process control

VISTACHROM® software

• Remote monitoring and injection control
• On-board archiving for traceability and QC
• Data export via MODBUS, MGS1, 4-20 mA, 0-10 V

Standards, approvals & certifications
Includes references to ASTM and, where applicable, ATEX / IECEx certification for Ex zone 1 (group IIC T4).

Technical data summary

• Model: H2S MEDOR®
• Detection limit H2S: down to 0.1 ppm (0.1417 mg/m3)
• Measurement ranges: 0/10, 0/100, 0/1000 (ppb/ppm) or % with internal loop valve
• Cycle time: 120 s (0–3 ppm); 300 s (higher ranges)
• On-board computer: Windows® embedded, LCD, 128 GB SSD
• Communications: MODBUS RTU, Ethernet, 4-20 mA, 0-10 V, MGS1
• Gas supply: carrier dry air or N2 (3 bar) <4 ml/min; sample flow 160 ml/min