CUBIC INSTRUMENTS Gasboard-3100 Online Multi-Gas Analyzer for Coke Oven Gas, Biomethane & Syngas

Overview

The CUBIC INSTRUMENTS Gasboard-3100 is a fully integrated online gas analyzer engineered for continuous, real-time measurement of multi-component gas mixtures in industrial fuel gas streams—including coke oven gas, blast furnace gas, producer gas, biogas, and syngas. It employs a hybrid sensing architecture combining non-dispersive infrared (NDIR) spectroscopy for hydrocarbons and carbon oxides, thermal conductivity detection (TCD) for hydrogen, and electrochemical detection (ECD) for oxygen—enabling simultaneous quantification of CO, CO₂, CH₄, H₂, O₂, C₂H₂, C₂H₄, and total non-methane hydrocarbons (CnHm). Critically, the instrument computes gross calorific value (GCV) in real time using ASTM D3588-17 and ISO 6976-compliant algorithms, eliminating reliance on offline bomb calorimetry. Its design prioritizes metrological integrity under variable process conditions: NDIR channels feature temperature-stabilized optical cells to suppress thermal drift, while TCD and ECD modules incorporate flow-insensitive calibration protocols and active zero-reference compensation via integrated air pump.

Key Features

• Multi-technology platform: Simultaneous NDIR (CO, CO₂, CH₄, C₂H₂, C₂H₄, CnHm), TCD (H₂), and ECD (O₂) detection in a single analyzer chassis.
• Cross-interference mitigation: Engineered spectral filtering and algorithmic compensation ensure CH₄ measurement remains unaffected by CnHm; H₂ quantification is invariant across sample flow fluctuations (0.7–1.2 L/min).
• Auto-calibration capability: Integrated zero-air pump enables scheduled or triggered automatic baseline correction without manual intervention.
• Robust wet-gas handling: All gas-wetted components—including sample lines, valves, and sensor chambers—are fabricated from 316 stainless steel and PTFE to resist corrosion from acidic condensates, sulfur compounds, and tars common in coal-derived gases.
• Thermal stability architecture: NDIR detectors operate within a precisely controlled thermal envelope (±0.1°C), ensuring long-term signal stability and minimizing recalibration frequency in ambient temperature swings.
• Dual calorific value output: Real-time GCV calculation with selectable units (kcal/m³ and MJ/m³), traceable to ISO 6976 thermodynamic models and validated against reference gas standards.

Sample Compatibility & Compliance

The Gasboard-3100 is qualified for use with raw or partially conditioned industrial gas streams meeting ISO 8573-1 Class 4 particulate, Class 3 moisture, and Class 2 oil contamination limits. It complies with IEC 61000-6-2 (immunity) and IEC 61000-6-4 (emissions) for industrial electromagnetic environments. While not certified for hazardous area installation (e.g., ATEX/IECEx), it is designed for safe operation in Zone 2/Class I Division 2 environments when installed downstream of certified sample conditioning systems. Data integrity aligns with GLP/GMP principles: all measurements include embedded timestamps, sensor health diagnostics, and audit-ready event logs. Optional firmware supports FDA 21 CFR Part 11-compliant electronic signatures and user-access-controlled configuration changes.

Software & Data Management

The analyzer ships with CUBIC’s GasVision™ PC software, supporting configuration, real-time monitoring, historical trend analysis, and report generation (PDF/CSV). Communication interfaces include Modbus RTU over RS-485 (default), ASCII protocol over RS-232, and isolated 4–20 mA analog outputs per measured component. Data logging resolution is configurable from 1 second to 1 hour; local storage retains ≥30 days of 1-minute averaged data. Remote access is enabled via secure TCP/IP (optional Ethernet module), allowing integration into DCS/SCADA platforms using standard OPC UA or MQTT protocols. Firmware updates are performed via USB or network, with version rollback capability and SHA-256 signature verification.

Applications

• Metallurgical process control: Continuous monitoring of coke oven gas composition and heating value for blast furnace injection optimization and energy accounting in integrated steel plants.
• Biogas upgrading: Real-time tracking of CH₄, CO₂, H₂S (via optional sensor), and O₂ in anaerobic digestion effluent to support membrane separation and pressure swing adsorption control.
• Syngas quality assurance: Quantification of H₂/CO ratio, tar precursors (CnHm), and combustion contaminants in gasification plants to maintain Fischer–Tropsch catalyst integrity.
• Academic combustion research: High-temporal-resolution sampling during flame stabilization studies, burner tuning, and emission factor validation per EPA Method 3A and ISO 10849.
• Waste-to-energy facilities: Feedstock flexibility assessment via dynamic GCV tracking across municipal solid waste, sewage sludge, and agricultural residue feedstocks.

FAQ

What gas species does the Gasboard-3100 measure simultaneously?
It measures CO, CO₂, CH₄, H₂, O₂, C₂H₂, C₂H₄, and total non-methane hydrocarbons (CnHm) in parallel, with real-time gross calorific value (GCV) calculation.
Is the analyzer suitable for raw biogas with high moisture and H₂S content?
It requires external sample conditioning (chilling, filtration, and chemical scrubbing) to meet ISO 8573-1 Class 3 moisture and Class 2 oil specifications; H₂S must be removed prior to inlet to prevent ECD poisoning.
How often is calibration required under continuous operation?
With automatic air-zero functionality and thermal stabilization, field calibration interval is typically 3–6 months; NIST-traceable span gas verification is recommended quarterly.
Can the Gasboard-3100 interface with a Siemens S7 PLC?
Yes—via Modbus RTU over RS-485 or optional Modbus TCP/IP, with preconfigured function blocks available for S7-1200/1500 series.
Does the instrument support regulatory reporting formats such as EPA GHG MR?
Raw concentration data and computed GCV values comply with EPA Subpart C and Subpart I reporting requirements; users must map outputs to their specific e-GGRT submission templates.