CUBIC INSTRUMENTS Gasboard-9031EX Biogas and Industrial Gas Analysis System

Overview

The CUBIC INSTRUMENTS Gasboard-9031EX is an integrated, explosion-proof biogas and industrial process gas analysis system engineered for continuous, real-time multi-component gas monitoring in demanding industrial environments. It operates on a hybrid detection architecture combining non-dispersive infrared (NDIR) spectroscopy for CO, CO₂, CH₄, C₂H₂, C₂H₄, and total non-methane hydrocarbons (CnHm), electrochemical detection (ECD) for O₂, and thermal conductivity detection (TCD) for H₂. This tri-modal sensing strategy ensures high selectivity and stability across variable gas matrices—particularly in low-dust, high-moisture applications such as blast furnace gas, coke oven gas, dry-quenching circulating gas, and biogas upgrading streams. The system computes higher heating value (HHV) and lower heating value (LHV) in real time using ASTM D1826–17 and ISO 6976–2016-compliant stoichiometric algorithms, eliminating the need for offline calorimetric validation. Designed for 24/7 unattended operation, it meets functional safety requirements for Class I, Division 1 hazardous locations per IEC 60079-0 and EN 60079-1.

Key Features

• Modular architecture comprising three independently serviceable units: heated stainless-steel dry-sampling probe with reverse-pulse purging, PLC-controlled conditioning unit with single-stage thermoelectric cooler and dual-stage particulate/moisture filtration, and a certified Ex d IIC T4 Gb analyzer module.
• Self-diagnostic firmware continuously monitors sensor drift, optical path integrity, zero-gas pressure, and temperature gradients—logging events with timestamps for GLP/GMP audit trails.
• Air-based automatic zero calibration executed via integrated zero-air pump, eliminating dependency on external calibration gases during routine operation.
• Real-time thermal value calculation compliant with ISO 6976:2016 Annex A, supporting both volumetric and molar basis inputs; output includes HHV (MJ/m³), LHV (MJ/m³), and Wobbe Index (MJ/m³).
• Robust mechanical design rated IP65 for enclosure integrity; operating ambient temperature range: −10 °C to +50 °C; sample gas temperature tolerance up to 200 °C at probe inlet.

Sample Compatibility & Compliance

The Gasboard-9031EX is validated for use with raw and conditioned biogas, syngas, blast furnace gas (BFG), coke oven gas (COG), and converter gas. Its pre-treatment subsystem removes particulates down to 0.3 µm and dew point suppresses moisture to <5 °C, minimizing interference from condensable organics and aerosols. All gas contact materials comply with ASTM F2249 for elastomer compatibility with hydrocarbon-rich streams. The system conforms to electromagnetic compatibility standards IEC 61326-1 (industrial environment) and carries CE marking under the ATEX Directive 2014/34/EU. Data integrity protocols align with FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed with optional audit-log-enabled software.

Software & Data Management

The embedded control firmware supports Modbus RTU/TCP, OPC UA (v1.04), and standard analog (4–20 mA) outputs for seamless integration into DCS, SCADA, or MES platforms. Optional CUBIC CloudLink software provides remote configuration, historical trend visualization (up to 1 year of 1-second resolution data), alarm threshold management, and CSV/PDF report generation. All communication channels support TLS 1.2 encryption. Data logging includes timestamped raw sensor voltages, compensated concentration values, diagnostic flags, and calibration event metadata—enabling traceability for ISO/IEC 17025 accredited laboratories.

Applications

• Continuous monitoring of biogas composition and calorific value in anaerobic digestion plants, landfill gas recovery systems, and wastewater treatment facilities.
• In-line analysis of blast furnace top gas, basic oxygen furnace off-gas, and electric arc furnace exhaust for energy recovery optimization and carbon accounting.
• Process control in coal gasification, biomass pyrolysis, and hydrogen production units where real-time H₂, CO, and CH₄ tracking informs catalyst management and safety interlocks.
• Regulatory compliance reporting for EPA Method 25A, EN 15403:2006, and China’s HJ 1012–2018 standard for stationary source emissions monitoring.
• Research-grade gas composition profiling in catalytic reaction studies, fuel blending experiments, and combustion efficiency testing.

FAQ

What gas components does the Gasboard-9031EX measure simultaneously?
It measures CO, CO₂, CH₄, H₂, O₂, C₂H₂, C₂H₄, and CnHm (sum of non-methane hydrocarbons) in parallel, with real-time calculation of gross and net calorific values.
Is the system suitable for high-humidity biogas without external chillers?
Yes—the integrated thermoelectric cooler and coalescing filter reduce sample dew point below 5 °C, enabling stable NDIR performance even at inlet humidity levels up to 95 % RH.
How often is manual maintenance required?
Under typical biogas conditions, scheduled maintenance intervals are every 6 months, primarily involving filter replacement and optical window inspection; no consumables are required for sensor operation.
Can the system interface with Siemens PCS7 or Honeywell Experion DCS?
Yes—via native Modbus TCP or OPC UA, with preconfigured device description (DD) files available for direct import into engineering stations.
Does the analyzer meet SIL2 requirements for safety instrumented functions?
While not certified as a standalone SIF device, its hardware architecture and diagnostic coverage (DC ≥ 90 %) support integration into SIL2-rated loops when configured per IEC 61511 Part 1 Annex E guidelines.