HORIBA VA/VS-5000 Multi-Component Gas Analyzer
| Brand | HORIBA |
|---|---|
| Origin | Japan |
| Model | VA/VS-5000 |
| Instrument Type | Portable / Rack-Mountable |
| Detection Target | Multi-component gases |
| Minimum Range | 1–20 ppm |
| Repeatability | ±0.5% F.S. |
| Resolution | 0.1 ppm |
| Response Time | T90 ≤ 30 sec |
| Zero Drift | ±2.0% F.S./week (except galvanic cell) |
| Span Drift | ±2.0% F.S./week (except galvanic cell) |
| Linearity Error | ±1.0% F.S. |
| Sampling Flow Rate | ~0.5 L/min (analyzer) |
| Operating Temperature | 0–40 °C |
| Relative Humidity | ≤90% RH |
| Power Supply | 100–240 VAC, 50/60 Hz |
| Power Consumption | 100–450 VA |
| Dimensions (VA unit) | 430 × 132 × 500 mm (W×H×D) |
| (VS unit) | 430 × 221 × 550 mm |
| Weight | ~14–20 kg |
Overview
The HORIBA VA/VS-5000 Multi-Component Gas Analyzer is a modular, rack-mountable or portable analytical system engineered for continuous, high-stability measurement of up to four gas components simultaneously in demanding environmental, industrial, and process monitoring applications. It integrates multiple detection technologies—including Non-Dispersive Infrared (NDIR), Chemiluminescence Analysis (CLA), Magnetic Paramagnetic Analysis (MPA), electrochemical (galvanic cell), and zirconia-based oxygen sensing—within a unified platform architecture. Each sensor module operates independently with dedicated signal conditioning, temperature stabilization, and auto-calibration logic, enabling precise quantification across an exceptionally wide dynamic range: from sub-ppm trace levels (e.g., NOx: 0–20 ppm) to high-concentration volumetric percentages (e.g., CO2: 0–100 vol%, CH4: 0–100 vol%). The system employs real-time cross-gas interference correction, including O2-compensated concentration calculation, and features integrated sample conditioning via refrigerated dew-point control (≤5 °C), particulate filtration (<0.1 mg/m³), and pressure regulation (±980 Pa), ensuring robust performance under variable stack or ambient sampling conditions.
Key Features
- Modular sensor architecture supporting up to four simultaneous gas measurements, with optional expansion to eight ranges for CLA-based analytes (e.g., NOx)
- Multi-technology platform: NDIR (CO, CO2, CH4, SO2, N2O), CLA (NO, NO2, NOx), MPA (O2), galvanic cell (O2, H2S), and zirconia (O2) sensors—each optimized for selectivity, stability, and low maintenance
- Active thermal management: built-in thermostatic control for optical cells and electrochemical sensors to minimize drift and enhance long-term reproducibility
- Automated zero/span verification and drift compensation algorithms compliant with ISO 12039 and EPA Method 6C requirements for continuous emission monitoring systems (CEMS)
- Rack-mountable 19-inch chassis design (VA unit: 430 × 132 × 500 mm; VS preconditioner: 430 × 221 × 550 mm) with corrosion-resistant wetted materials (SUS316, PTFE, PVDF, FKM, borosilicate glass)
- Dual analog outputs (0–1 V DC and 4–20 mA) plus RS-232C digital interface for integration into SCADA, DCS, or PLC-based control environments
Sample Compatibility & Compliance
The VA/VS-5000 accommodates complex sample matrices typical of flue gas, biogas, landfill emissions, combustion exhaust, and indoor air quality studies. Sample inlet specifications require particulate loading ≤0.1 mg/m³, water vapor dew point ≤60 °C (with optional chiller reducing to ≤5 °C), and pressure fluctuations within ±980 Pa. All wetted components are chemically inert and certified for use with aggressive gases including SO2, NOx, H2S, and halogenated compounds. The system meets CE marking requirements per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD), and supports configuration for GLP/GMP environments through audit-trail-capable firmware logging (optional). While not pre-certified to EN 15267 or MCERTS, its sensor-level performance metrics—including ±0.5% F.S. repeatability and ±1.0% F.S. linearity—align with Tier 2 CEMS validation criteria defined in ISO 14064-3 and US EPA PS-11.
Software & Data Management
The embedded firmware provides local data acquisition at 1-second intervals, internal storage of ≥30 days of 1-minute averaged values, and configurable alarm thresholds with relay outputs. Communication protocols include ASCII-based RS-232C command sets compatible with third-party data loggers and historian systems. Optional HORIBA GASS-View software enables remote configuration, trend visualization, calibration history tracking, and report generation aligned with ISO/IEC 17025 documentation standards. All calibration events, zero/span checks, and sensor diagnostics are timestamped and stored with user ID attribution, satisfying traceability requirements for FDA 21 CFR Part 11 when deployed in regulated manufacturing or R&D settings.
Applications
- Continuous emission monitoring (CEM) of CO, CO2, NOx, SO2, CH4, and O2 from industrial boilers, incinerators, and cement kilns
- Biogas quality control in anaerobic digestion plants (CH4/CO2/H2S/O2 composition profiling)
- Landfill gas monitoring for regulatory reporting and energy recovery optimization
- Combustion efficiency analysis and stoichiometric tuning in power generation and heating systems
- Indoor air quality (IAQ) assessment in laboratories, cleanrooms, and controlled-environment facilities
- Research-grade gas mixture characterization in catalysis, material synthesis, and atmospheric simulation chambers
FAQ
What detection principles are supported by the VA/VS-5000 platform?
The system supports five core detection methods: Non-Dispersive Infrared (NDIR) for CO, CO2, CH4, SO2, and N2O; Chemiluminescence Analysis (CLA) for NO/NO2/NOx; Magnetic Paramagnetic Analysis (MPA) for O2; electrochemical (galvanic cell) for O2 and H2S; and zirconia-based potentiometric sensing for high-temperature O2.
Can the analyzer operate unattended for extended periods?
Yes—the system is designed for continuous operation with automatic zero/span verification cycles, thermal stabilization, and drift compensation algorithms. Weekly zero/span drift is specified at ±2.0% F.S., supporting up to 7-day calibration intervals under stable operating conditions.
Is the VA/VS-5000 suitable for corrosive or high-moisture gas streams?
When configured with the VS-5000 series preconditioning unit—including refrigerated dryer, particulate filter, and corrosion-resistant sample lines (PTFE, PVDF, SUS316)—the system reliably handles flue gases with dew points down to 5 °C and H2S/SO2 concentrations common in waste-to-energy applications.
How many gases can be measured simultaneously, and what are the maximum configurable ranges?
Up to four gases may be measured concurrently. Configurable ranges span from 0–20 ppm (NOx, N2O) to 0–100 vol% (CO2, CH4, O2), with CLA modules supporting up to eight programmable ranges per channel for flexible method switching.
Does the system support regulatory compliance reporting?
While not pre-certified to MCERTS or EN 15267, the VA/VS-5000 meets fundamental metrological requirements for CEMS validation (ISO 12039, EPA PS-11). With optional GASS-View software and audit-trail firmware, it supports data integrity practices required under FDA 21 CFR Part 11 and ISO/IEC 17025.
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