NOVA 970P Portable Synthesis Gas Analyzer

Overview

The NOVA 970P Portable Synthesis Gas Analyzer is an engineered solution for on-site, real-time multicomponent gas analysis in demanding industrial environments—including coal gasification, biomass-derived syngas conditioning, landfill biogas upgrading, and hydrogen-rich reformate streams. Utilizing dual-beam non-dispersive infrared (NDIR) spectroscopy across three dedicated optical channels, the instrument delivers simultaneous, interference-compensated quantification of carbon monoxide (CO), carbon dioxide (CO₂), and methane (CH₄) at sub-percent volume levels. A fourth detection channel—configurable as either a high-stability thermal conductivity detector (TCD) for hydrogen (H₂) or a paramagnetic oxygen (O₂) sensor—enables full compositional profiling without external analyzers. The system’s optical architecture employs thermally stabilized, cleanable NDIR cells with gold-coated reflective surfaces and reference-compensated photodetectors, minimizing drift and enabling recalibration intervals exceeding 90 days under routine field use. All gas pathways are constructed from electropolished 316 stainless steel to resist corrosion from acidic condensates and trace halogens commonly present in raw syngas.

Key Features

• Dual-beam NDIR detectors for CO, CO₂, and CH₄ with built-in zero-span verification capability and optical path contamination monitoring
• Cleanable, field-serviceable infrared cells—no consumable optics or sealed modules requiring factory return
• Integrated H₂ compensation algorithm that dynamically corrects CO/CO₂/CH₄ readings based on real-time TCD output, critical for accurate stoichiometric ratio calculation in Fischer–Tropsch feed streams
• Modular O₂ sensing: user-selectable paramagnetic (for high-accuracy, low-drift O₂ in inert matrices) or long-life electrochemical cell (for cost-sensitive intermittent monitoring)
• Four-stage filtration system: 5 µm particulate pre-filter, coalescing hydrophobic membrane, activated carbon adsorber, and optional Peltier-cooled condensate trap for wet sample streams
• Embedded sampling pump with adjustable flow control (0.5–2.0 L/min), integrated mass flow meter, and pressure-regulated bypass loop
• Backlit graphical LCD display showing real-time concentration values, diagnostic status, calibration history, and alarm flags
• Rechargeable Li-ion battery pack supporting ≥8 hours continuous operation; hot-swappable design enables uninterrupted field deployment
• Benchtop (BT) or portable carry-case (K) enclosure options, both rated IP54 for dust and splash resistance
• Temperature-controlled sensor housing (AC-powered mode only) maintaining ±0.1 °C stability for NDIR cell thermal equilibrium

Sample Compatibility & Compliance

The 970P accommodates sample gases with moisture content up to 40% v/v (with optional dehumidification module), particulate loading ≤1 mg/m³, and H₂S concentrations <50 ppm (with activated carbon guard bed). It meets mechanical and electrical safety requirements per CSA C22.2 No. 61010-1 and IEC 61000-6-2/6-4 for electromagnetic compatibility. While not certified for hazardous area installation (e.g., ATEX/IECEx), it complies with ISO 8573-1 Class 4 compressed air purity standards for internal pneumatic components. Data integrity aligns with GLP/GMP principles: all calibrations are timestamped, operator-ID logged, and stored in non-volatile memory with write-protection. Analog outputs support connection to DCS/SCADA systems compliant with ISA-84.00.01 (IEC 61511) functional safety architectures when used in non-SIL-critical monitoring loops.

Software & Data Management

The analyzer operates standalone with no PC dependency, but includes RS-232 and optional USB-C interface for configuration backup, firmware updates, and raw data export (CSV format). Calibration records, alarm logs, and sensor health diagnostics are retained for ≥12 months. Optional NOVA Link™ software provides remote parameter adjustment, trend visualization over 30-day windows, and automated report generation aligned with ISO/IEC 17025 documentation templates. Audit trails include event type, timestamp, user ID, pre/post-values, and digital signature—fully compatible with FDA 21 CFR Part 11 requirements when deployed with validated electronic signature workflows.

Applications

• Syngas quality control in entrained-flow and fluidized-bed gasifiers
• Biogas upgrading plant inlet/outlet composition verification prior to amine scrubbing or PSA units
• Hydrogen purity assessment in steam methane reformer (SMR) off-gas streams
• Landfill gas flare efficiency monitoring via CH₄ destruction rate calculation
• Research-scale pyrolysis and torrefaction reactor effluent characterization
• QA/QC for catalyst performance evaluation in methanation or water-gas shift reactors

FAQ

What gases can the 970P measure simultaneously out of the box?
CO, CO₂, and CH₄ via NDIR; O₂ via paramagnetic or electrochemical sensor; H₂ via thermal conductivity detector—all active concurrently with cross-interference correction.
Is field calibration possible without sending the unit to a service center?
Yes: zero calibration using certified dry air and span calibration using NIST-traceable multi-gas standards (e.g., 2% CO / 15% CO₂ / 25% CH₄ in N₂) can be performed onsite with standard calibration adapters.
Can the 970P operate continuously in high-humidity biogas without condensation damage?
With the optional Peltier-based dehumidification module and four-stage filtration, it supports continuous operation at dew points up to 15 °C; for saturated streams (>30 °C dew point), a chilled mirror dew point monitor is recommended upstream.
Does the instrument support Modbus RTU or other industrial protocols?
Standard analog outputs (4–20 mA) are provided; Modbus RTU over RS-485 is available as a factory-configured option with protocol mapping documentation supplied.
What is the typical measurement uncertainty for CO at 1% v/v under field conditions?
±0.05% v/v (k=2, 95% confidence) when calibrated with matrix-matched standards and operated within specified temperature/humidity ranges.