LTGA-700 Laser-Based Trace Gas Analyzer by FPI
| Brand | FPI |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Original Equipment Manufacturer (OEM) |
| Country of Origin | China |
| Model | LTGA-700 |
| Pricing | Available upon Request |
Overview
The LTGA-700 Laser-Based Trace Gas Analyzer is an advanced in-situ and extractive online gas analysis system engineered for high-sensitivity, selective detection of trace-level gaseous species in demanding industrial process streams. Utilizing tunable diode laser absorption spectroscopy (TDLAS) with single-line absorption methodology, the analyzer targets specific rotational-vibrational transitions of target molecules—ensuring inherent selectivity without spectral cross-interference from co-existing gases such as H₂O, CO₂, or CH₄. Its long-path optical cavity design significantly enhances effective absorption pathlength—typically exceeding 10 meters in folded configuration—thereby improving minimum detectable concentration (MDC) to sub-parts-per-trillion (ppt) levels for key analytes including NH₃, HCl, HF, H₂S, CO, NO, and CH₄, depending on configuration and calibration. Designed for continuous unattended operation under fluctuating ambient conditions, the LTGA-700 delivers stable baseline performance across temperature ranges of −20 °C to +50 °C and relative humidity up to 95% non-condensing.
Key Features
- Single-line TDLAS technology with wavelength modulation spectroscopy (WMS) for interference-free quantification of target gases
- Long-path multi-pass optical cell enabling enhanced sensitivity and low detection limits (e.g., <50 ppb for NH₃, <100 ppb for HCl in standard configuration)
- Robust mechanical architecture with IP65-rated enclosure, suitable for installation in Zone 2/Class I Division 2 hazardous areas when configured with appropriate certifications
- Minimal sample conditioning requirements: integrated heated sampling line (up to 180 °C), particulate filtration, and pressure/temperature stabilization—eliminating need for complex cold-trap or chemical scrubber systems
- Self-diagnostic optical alignment monitoring and automatic zero/span verification capability via internal reference gas cell or external calibration port
- Modular hardware design supporting field-upgradable firmware, dual-analyte configurations, and optional analog/digital I/O expansion for integration into DCS/PLC networks
Sample Compatibility & Compliance
The LTGA-700 accommodates a wide range of process gas matrices—including corrosive, humid, and particulate-laden streams—from refineries, petrochemical crackers, syngas units, chlor-alkali electrolysis cells, natural gas transmission stations, and fine chemical synthesis reactors. Sample inlet pressure tolerance spans 0.5–2.5 bar(g), with operating temperatures up to 200 °C when equipped with high-temp probe options. The analyzer complies with IEC 61508 SIL2 functional safety requirements for critical emission monitoring applications and meets electromagnetic compatibility standards per EN 61326-1. It supports audit-ready data logging aligned with ISO 14064-1 greenhouse gas quantification protocols and enables secure, time-stamped measurement records required for EPA Method 320 and EN 15267-3 compliance verification.
Software & Data Management
FPI’s proprietary Analytical Control Suite (ACS) provides intuitive web-based interface accessible via Ethernet or optional cellular modem. ACS implements role-based user access control (RBAC), full audit trail functionality compliant with FDA 21 CFR Part 11 (electronic signatures, change history, and data integrity safeguards), and configurable alarm thresholds with email/SMS notification. Raw absorbance spectra, second-harmonic signals, and real-time concentration trends are stored in SQLite databases with automatic backup to network drives. Export formats include CSV, PDF reports, and OPC UA server integration for seamless interoperability with OSIsoft PI System, Emerson DeltaV, and Honeywell Experion platforms. Firmware updates are performed remotely via signed package deployment with rollback capability.
Applications
- Continuous ammonia slip monitoring downstream of SCR denitrification systems in FCC units and power generation facilities
- HCl and HF concentration tracking in alkylation and hydrofluoric acid (HF) alkylation units to ensure catalyst integrity and corrosion mitigation
- H₂S and COS quantification in Claus tail gas treatment loops for sulfur recovery optimization
- CO and NO monitoring in syngas purification trains for Fischer–Tropsch feedstock qualification
- Methane leak detection and compositional analysis in natural gas custody transfer and biogas upgrading plants
- Process gas purity verification during high-value specialty chemical synthesis (e.g., pharmaceutical intermediates, electronic-grade gases)
FAQ
What detection principle does the LTGA-700 employ?
It uses tunable diode laser absorption spectroscopy (TDLAS) with wavelength modulation and single-line targeting to achieve molecule-specific quantification.
Is the analyzer certified for use in hazardous locations?
Yes—when equipped with ATEX/IECEx or UL/cUL Class I Division 2 certification options, it is approved for installation in classified zones.
Can the LTGA-700 measure multiple gases simultaneously?
Standard configuration supports one primary analyte; dual-gas variants (e.g., NH₃ + HCl) are available via dual-laser module integration.
Does the system require periodic calibration with standard gases?
Yes—recommended quarterly zero/span verification using NIST-traceable calibration standards; automated verification cycles can be scheduled within ACS software.
How is data security and regulatory compliance ensured?
Through 21 CFR Part 11-compliant audit trails, encrypted database storage, RBAC permissions, and electronic signature workflows embedded in ACS.
