ProGC-3900 Online Gas Chromatograph by FPI (Hangzhou Focus Photonics)

Overview

The ProGC-3900 Online Gas Chromatograph is an industrial-grade, fully automated gas chromatography system engineered for continuous, real-time compositional analysis of process gas streams in demanding production environments. Built upon a robust dual-column, dual-detector architecture—typically incorporating flame ionization detection (FID) and thermal conductivity detection (TCD)—the instrument operates on the fundamental principle of differential partitioning of gaseous analytes between a mobile phase (carrier gas, e.g., helium or hydrogen) and stationary phases coated inside fused-silica capillary or micro-packed columns. Retention time profiling enables quantitative identification and concentration measurement of permanent gases (e.g., O₂, N₂, Ar, CH₄), light hydrocarbons (C₁–C₅), and trace impurities (e.g., CO, CO₂, H₂S) with high selectivity and repeatability. Designed specifically for integration into distributed control systems (DCS) and safety instrumented systems (SIS), the ProGC-3900 delivers reliable, unattended operation under fluctuating temperature, pressure, and vibration conditions typical of air separation plants, petrochemical refineries, and syngas production facilities.

Key Features

• Integrated sample conditioning system with heated sample lines, particulate filtration, moisture removal, and pressure regulation to ensure representative, stable injection under variable process conditions
• Automated valve sequencing and column switching logic for multi-stream analysis (up to 8 sample points via optional multiplexer)
• Self-diagnostic firmware with real-time monitoring of detector baseline stability, column oven temperature uniformity, carrier gas flow integrity, and valve actuation status
• Compact modular chassis (standard 19-inch rack-mountable design) optimized for installation in analyzer shelters or process skids with minimal footprint and simplified maintenance access
• High-temperature oven capable of precise ramping (0.1–40 °C/min) and isothermal hold (up to 250 °C) for method flexibility across diverse gas matrices
• Embedded industrial PC with solid-state storage, supporting local data logging, method storage, and remote diagnostics via Ethernet/IP or Modbus TCP

Sample Compatibility & Compliance

The ProGC-3900 accommodates pressurized process gas samples ranging from ambient to 1.6 MPa (gauge), with inlet temperatures up to 150 °C. It supports direct analysis of raw air, nitrogen, oxygen, argon, hydrogen, synthesis gas, natural gas, and refinery off-gas without pre-concentration. All wetted materials—including stainless-steel sample loops, valves, and column manifolds—are selected for inertness and corrosion resistance per ASTM A269 and ISO 8502 standards. The system complies with IEC 61511 for functional safety in SIS applications and meets electromagnetic compatibility (EMC) requirements per EN 61326-1. Optional hazardous area certification (ATEX II 2G Ex db IIB T4 Gb / IECEx DBI 20.0029X) is available for Zone 1 installations.

Software & Data Management

FPI ChromoView™ software provides intuitive method development, sequence scheduling, and chromatogram review via a web-based interface accessible from any standard browser. Raw chromatographic data (including retention times, peak areas, and calibration curves) are stored in vendor-neutral CSV and CDF formats compliant with ASTM E1792. Audit trails record all user actions, method changes, calibration events, and instrument alerts—fully traceable and exportable to support GLP/GMP documentation requirements. Integration with LIMS and MES platforms is achieved through OPC UA and RESTful API endpoints. Data integrity safeguards include password-protected user roles (operator, supervisor, administrator), electronic signatures, and 21 CFR Part 11–compliant audit trail generation when configured with optional validation packages.

Applications

• Continuous purity monitoring of high-purity oxygen and nitrogen in cryogenic air separation units (ASUs), ensuring compliance with ISO 8573-1 Class 1–2 specifications
• Real-time tracking of argon recovery efficiency and krypton/xenon trace impurities in ASU crude argon columns
• In-process control of hydrogen-to-carbon monoxide ratio in Fischer–Tropsch synthesis loops
• Leak detection and composition verification in ethylene oxide/propylene oxide reactor purge streams
• Impurity profiling (e.g., acetylene, phosphine, arsine) in semiconductor-grade bulk gases per SEMI F57 standards
• Combustible gas monitoring in flare gas recovery systems for environmental reporting and energy optimization

FAQ

What sample introduction methods does the ProGC-3900 support?
It uses pressurized loop injection with automated six-port or ten-port rotary valves; optional thermal desorption or gas bag sampling modules are available for low-concentration or intermittent stream analysis.
Can the system be calibrated automatically?
Yes—integrated auto-calibration sequences support multi-point gas standard injections using certified reference materials (CRMs); calibration frequency and tolerance limits are programmable per method.
Is remote firmware update capability supported?
Firmware updates can be deployed over secure HTTPS connections using signed binary packages; rollback functionality ensures system recoverability after update failure.
What is the typical analysis cycle time for a full air separation gas matrix?
Standard methods for O₂/N₂/Ar/CH₄/CO₂ analysis achieve cycle times of 90–150 seconds, depending on column configuration and required resolution.
Does the ProGC-3900 meet SIL2 requirements for safety-critical measurements?
When configured with redundant detectors, dual power supplies, and certified safety logic solvers, the system supports SIL2-rated applications per IEC 61508 and IEC 61511, subject to site-specific safety lifecycle assessment.