MRU NOVAcompact Portable Flue Gas Analyzer

Overview

The MRU NOVAcompact is a high-integrity portable flue gas analyzer engineered for precision combustion diagnostics and regulatory emissions verification in industrial, commercial, and municipal heating systems. Based on electrochemical sensor technology for gas detection—complemented by thermocouple-based temperature measurement, piezoresistive differential pressure sensing, and Pitot tube-derived flow velocity calculation—the NOVAcompact delivers metrologically sound, field-deployable analysis across diverse fuel types including natural gas, LPG, light/heavy oil, biodiesel, coal, and biomass. Its modular architecture allows configuration with up to five electrochemical sensors, enabling simultaneous quantification of O₂, CO, NO, NO₂, SO₂, and high-range CO (up to 10.00% vol). The instrument adheres to the performance criteria outlined in EN 50379-1 and EN 50379-2 for portable combustion analyzers and supports traceable compliance workflows aligned with ISO 12039 (stationary source emissions), ISO 10849 (CO measurement), and VDI 3862 (combustion efficiency assessment).

Key Features

• Five-year service life electrochemical O₂ sensor with built-in diagnostic self-check and automatic zero stabilization
• Dual-range CO detection: standard (0–500 ppm) and high-concentration (0–20,000 ppm or 0–10.00% vol) channels, each with H₂ compensation and dedicated protective purge pump
• Integrated Peltier-based condensate management system with auto-drain蠕动 pump and 120 mL collection bottle—enabling stable operation in high-humidity flue streams (up to 95% RH)
• Multi-stage particulate filtration: stainless-steel star-pattern fine filter with hydrophobic PTFE membrane (cleanable and reusable), followed by cyclonic moisture separator and sintered metal pre-filter
• Real-time sampling flow monitoring and leak detection algorithm—alerts users to compromised probe integrity or hose disconnection during measurement
• Automated test sequences with user-defined averaging intervals (e.g., 1-, 5-, or 10-minute means), time-stamped storage, and on-device thermal printout capability
• Self-diagnostic firmware that continuously verifies sensor health, battery status, pump function, and calibration validity

Sample Compatibility & Compliance

The NOVAcompact is validated for use with flue gases from boilers, furnaces, kilns, incinerators, and cogeneration units operating on gaseous, liquid, and solid fuels. Its stainless-steel or high-temperature alloy sampling probes (rated to 650 °C or 1100 °C) accommodate stack conditions ranging from low-velocity residential chimneys to high-velocity industrial ducts (1–40 m/s). All gas measurements meet the accuracy requirements specified in EN 50379-2 for portable analyzers, while calculated parameters—including CO₂, excess air ratio (λ), combustion efficiency (η), flue gas dew point, and normalized NOₓ/SO₂ concentrations (mg/Nm³ at selectable reference O₂ levels: 3%, 5%, or 8%)—are derived using fuel-specific stoichiometric algorithms compliant with ISO 12039 Annex B. When paired with MRU Online View software and configured with timestamped, non-erasable logging, the system satisfies documentation requirements under GLP and supports FDA 21 CFR Part 11–aligned electronic record practices where enabled by site policy.

Software & Data Management

Data acquisition, post-processing, and reporting are supported via MRU Online View—a Windows-based application certified for scientific data handling in regulated environments. The software enables synchronized multi-instrument deployment, batch export to CSV/Excel, automated report generation (PDF/HTML), and spectral trend visualization across time-series datasets. Internal memory stores 16,000 measurement sets with full parameter metadata (gas concentrations, temperatures, pressures, timestamps, operator ID, and calibration history). Optional 2 GB SD cards extend capacity for long-term unattended monitoring. USB 2.0 and Bluetooth 4.2 interfaces permit real-time telemetry to laptops, tablets, or cloud gateways. All stored data include immutable audit trails when configured with user authentication and digital signature options—facilitating internal QA reviews and external regulatory audits.

Applications

• Periodic boiler efficiency audits per EN 303-2 and EN 12952-15
• Emissions verification for compliance with EU IED (Industrial Emissions Directive) and national BAT conclusions
• Troubleshooting incomplete combustion in gas-fired heating systems via CO/CO₂ ratio analysis and λ deviation mapping
• Commissioning support for low-NOₓ burners, FGR (flue gas recirculation) systems, and oxygen-trim controls
• Field validation of CEMS (Continuous Emission Monitoring Systems) during relative accuracy testing (RAT)
• Academic and vocational training in energy engineering and environmental science laboratories

FAQ

What fuel types does the NOVAcompact support for combustion calculations?
Natural gas, LPG, light oil, heavy oil, biodiesel, coal, wood, and other solid biofuels—each with preloaded stoichiometric coefficients and default reference O₂ settings.
Can the instrument measure flue gas at temperatures above 650 °C?
Yes—when equipped with the optional high-temperature alloy probe (rated to 1100 °C), the NOVAcompact maintains ±1 °C accuracy up to 200 °C and ±0.5% of reading above that threshold.
Is the CO sensor protected against poisoning in high-H₂ or high-sulfur environments?
Yes—the integrated CO sensor protection pump activates automatically when user-defined concentration thresholds are exceeded, flushing the sensor chamber with ambient air to prevent catalytic deactivation.
How is data integrity ensured during extended field deployments?
All measurements include embedded UTC timestamps, operator ID tags, and calibration verification flags. With MRU Online View and enabled audit-trail mode, every data modification is logged with user, time, and action—meeting ALCOA+ principles for data reliability.
Does the NOVAcompact comply with US EPA Method 3A or ASTM D6522?
While not certified as a primary Method 3A analyzer, its electrochemical O₂/CO/NO/SO₂ modules meet the performance specifications cited in ASTM D6522 Annex A1 for portable field instruments used in preliminary screening and process optimization.