HORIBA PG-350 Portable Multi-Gas Analyzer
| Brand | HORIBA |
|---|---|
| Origin | Japan |
| Model | PG-350 |
| Instrument Type | Portable |
| Measured Gases | NOx, SO₂, CO, CO₂, O₂ |
| Range Options | 0–5 / 10 / 25 vol% (CO₂, O₂) |
| Repeatability | ±1.0% FS |
| Drift | ±1.0% FS/day (SO₂: ±2.0% FS/day) |
| Linearity | ±2.0% FS |
| Response Time (T90) | ≤45 s (all gases except SO₂: ≤180 s) |
| Sample Flow Rate | ~0.5 L/min |
| Warm-up Time | 30 min |
| Operating Temperature | 5–40 °C |
| Relative Humidity | ≤85% RH |
| Weight | ~14 kg |
| Dimensions | 226 × 265 × 510 mm (W×H×D) |
| Data Storage | SD card (user-configurable interval) |
| Outputs | 4–20 mA analog, Ethernet |
| Power Supply | 100–120 VAC / 200–240 VAC, 50/60 Hz |
| Compliance | UK MCERTS, EU TÜV, US EPA ETV, China CMA, KR KOLAS, JP JIS/JCSS |
Overview
The HORIBA PG-350 Portable Multi-Gas Analyzer is an engineered field-deployable instrument designed for high-fidelity, real-time quantification of up to five critical combustion and environmental gases—NOx, SO2, CO, CO2, and O2—with optional CH4 capability. Built on HORIBA’s proprietary alternating-flow modulation (AFM) technology, the PG-350 integrates multiple detection principles within a single compact platform: chemiluminescence detection (CLD) for NOx, non-dispersive infrared (NDIR) absorption with AFM for SO2, CO, and CH4, broadband NDIR for CO2, and electrochemical (galvanic cell) sensing for O2. This hybrid architecture eliminates cross-sensitivity artifacts common in single-principle analyzers and ensures metrological traceability under dynamic sampling conditions. The system delivers laboratory-grade accuracy—±2.0% FS linearity, ±1.0% FS repeatability, and <±1.0% FS/day zero/span drift (SO2: ±2.0% FS/day)—while operating at ambient pressure without vacuum pumps or cryogenic cooling. Its 30-minute warm-up time, robust shock- and vibration-resistant chassis, and integrated electronic condensate management enable reliable deployment in stack monitoring, mobile emission testing, catalyst evaluation, and university-based combustion research.
Key Features
- Alternating-flow modulation (AFM) architecture enhances signal-to-noise ratio and suppresses baseline drift in NDIR and CLD channels, improving long-term stability during unattended field operation.
- Full-color capacitive touchscreen interface with intuitive step-by-step on-screen guidance, real-time trend graphs, and contextual help—designed for operators with minimal gas analysis training.
- Integrated sample conditioning: heated sample line (optional), automatic electronic condensate trap with manual/automatic drainage, and programmable purge cycles to prevent sensor fouling.
- Multi-range configurable gas channels: seven selectable NOx ranges (0–25 to 2500 ppm), four SO2 ranges (0–200 to 3000 ppm), five CO ranges (0–200 to 5000 ppm), three CO2/O2 volume percent ranges (0–5 to 25 vol%), and dual CH4 ranges (0–2000/5000 ppm).
- Comprehensive data integrity framework: timestamped SD card logging (user-defined intervals), audit-trail-enabled calibration records, alarm-triggered event capture, and GLP-compliant metadata tagging (operator ID, location GPS tag via external module, ambient T/RH).
- Dual-output architecture supports simultaneous 4–20 mA analog transmission for PLC integration and Ethernet-based TCP/IP communication for remote diagnostics, firmware updates, and centralized data ingestion into SCADA or LIMS environments.
Sample Compatibility & Compliance
The PG-350 is validated for direct measurement of hot, humid, particulate-laden flue gas streams with dew point compensation and automatic dilution correction algorithms. It meets international regulatory requirements for portable reference methods, including UK MCERTS Performance Specification 17 (PS17), EU EN 15267-3 certified TÜV approval, US EPA Environmental Technology Verification (ETV) Program criteria for continuous emissions monitoring, and China’s JJG 968–2019 verification regulation for portable gas analyzers. All optical and electrochemical sensors are factory-calibrated against NIST-traceable standard gases and support full-system calibration—including pre-analyzer conditioning modules—per ISO 14064-3 and ASTM D6522 protocols. The instrument complies with IEC 61000-6-2/6-4 for electromagnetic compatibility and carries IP54 ingress protection for field enclosure integrity.
Software & Data Management
Firmware v3.2+ includes embedded data management tools compliant with FDA 21 CFR Part 11 requirements: role-based user authentication, electronic signatures for calibration events, immutable audit logs, and secure export of raw channel voltages alongside concentration values. Data export formats include CSV (time-stamped, header-annotated) and XML (compatible with ISO 10303-239 AP239 STEP AP239 for industrial asset digital twin integration). Remote access via HTTPS-enabled web server allows live parameter adjustment, diagnostic status review, and over-the-air firmware upgrades. Optional HORIBA GasVision™ desktop software provides advanced post-processing: multi-gas correlation plots, stoichiometric excess air calculation, thermal efficiency derivation, and automated compliance reporting per EU Directive 2010/75/EU (IED) Annex VI templates.
Applications
- CEMS backup and validation: Real-time cross-checking of fixed-stack monitors using identical detection principles and certified calibration protocols.
- Combustion optimization: In-situ measurement of O2, CO, and NOx during boiler tuning, furnace commissioning, and burner retrofit studies.
- Catalyst performance screening: Quantitative assessment of low-temperature NOx conversion efficiency and sulfur poisoning resistance in SCR/SNCR systems.
- Mobile source emissions: On-road and off-road engine testing per ISO 8178 and SAE J1939-71, including transient cycle mapping and cold-start characterization.
- Fuel cell R&D: Anode/cathode exhaust gas profiling (H2 slip inferred from O2/CO2 balance, CO tolerance evaluation).
- Ambient air quality surveys: Mobile monitoring of urban NO2 hotspots, landfill CH4 fugitive emissions, and industrial fence-line SO2 dispersion modeling.
FAQ
What gas detection technologies does the PG-350 employ?
It uses alternating-flow modulation chemiluminescence (AFM-CLD) for NOx, AFM-modulated non-dispersive infrared (AFM-NDIR) for SO2, CO, and CH4, broadband NDIR for CO2, and galvanic electrochemical cells for O2.
Is the PG-350 suitable for high-moisture flue gas sampling?
Yes—the built-in electronic condensate management system maintains stable dew point control, and all optical paths are temperature-regulated to prevent condensation-induced signal attenuation.
How is calibration traceability maintained in field use?
Each unit ships with a NIST-traceable calibration certificate; on-site span checks use certified gas mixtures, and full-system calibration—including sample line and filter—can be performed with the integrated zero/span valves and external calibration manifold.
Does the PG-350 support remote data acquisition and cloud integration?
Yes—Ethernet output enables MQTT/OPC UA connectivity to industrial IoT platforms; optional HORIBA CloudLink gateway provides TLS-encrypted data forwarding to AWS IoT Core or Microsoft Azure IoT Hub.
Can the PG-350 be used for compliance reporting under EU IED or US Clean Air Act?
It satisfies MCERTS PS17 and EPA ETV requirements as a portable reference method; however, formal compliance reporting requires site-specific QA/QC documentation per EN 14181 QAL2/QAL3 and adherence to local permitting authority protocols.
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