Axetris LGD F200 H Laser Gas Detection Module

Overview

The Axetris LGD F200 H Laser Gas Detection Module is an OEM-ready, compact optical sensor engineered for continuous, real-time measurement of ammonia (NH₃) and hydrogen chloride (HCl) in industrial and environmental process streams. Based on Tunable Diode Laser Absorption Spectroscopy (TDLAS), the module delivers non-contact, interference-free quantification by targeting fundamental ro-vibrational absorption lines unique to each gas species—ensuring high spectral selectivity and immunity to cross-sensitivity from water vapor, CO₂, or other common background gases. Designed for integration into larger monitoring systems, the LGD F200 H operates without consumables or calibration gases, relying instead on inherent wavelength stability and factory-traceable absorbance calibration. Its robust mechanical architecture and hermetically sealed optical path support long-term deployment in demanding environments—from high-humidity flue gas ducts to high-temperature synthesis reactors.

Key Features

• Optical, non-contact measurement principle eliminates sensor poisoning, drift, and electrode degradation associated with electrochemical or metal-oxide sensors
• Sub-2-second response time (T₉₀) enables dynamic process feedback control in fast-changing emission or reaction conditions
• ±2% measurement accuracy across the full 0–100 ppm range, validated per ISO 12039 and ASTM D6522 for trace gas quantification
• Integrated heating capability (up to 220 °C) prevents condensation and enables direct in-situ measurement of hot, wet, or corrosive process gases
• Compact form factor (120 × 80 × 45 mm) with standardized electrical interfaces (analog 4–20 mA, digital RS-485/Modbus RTU) facilitates drop-in integration into OEM analyzers and CEMS platforms
• Factory-calibrated with NIST-traceable reference spectra; no field recalibration required under stable operating conditions

Sample Compatibility & Compliance

The LGD F200 H is compatible with sample matrices including humidified exhaust gas (up to 100% RH), syngas, natural gas, and ambient air—with no requirement for gas conditioning when operated in heated mode. It meets key regulatory and quality framework requirements for continuous emissions monitoring: compliant with EN 15267-3 for QAL1 certification readiness, supports data integrity protocols aligned with EPA Method 320 and EU BREF guidelines for NH₃ slip monitoring in SCR systems, and provides audit-ready output logs suitable for GLP/GMP environments. Optional firmware enables configurable alarm thresholds and event-triggered data capture per IEC 61508 SIL 2 functional safety prerequisites.

Software & Data Management

The module communicates via industry-standard protocols (Modbus RTU over RS-485, analog 4–20 mA output) and is fully supported by Axetris’ LGD Control Software Suite—enabling remote configuration, spectral diagnostics, baseline correction, and real-time absorbance curve visualization. Raw spectral data and processed concentration values are timestamped and exportable in CSV or XML format for integration with SCADA, DCS, or LIMS platforms. All configuration changes and measurement events are logged with immutable timestamps, satisfying FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed in regulated pharmaceutical or medical device manufacturing settings.

Applications

• Power & Industrial Process Control: NH₃ slip monitoring downstream of selective catalytic reduction (SCR) systems in coal- and gas-fired power plants; HCl quantification in waste incineration and steel annealing atmospheres
• Environmental Monitoring: Continuous emission monitoring (CEM) for regulatory reporting; fugitive emission detection in chemical storage and transfer facilities; landfill and biogas plant odorant tracking
• Energy & Fuels: Real-time HCl detection in natural gas transmission pipelines and upstream sour gas processing; syngas composition verification in Fischer–Tropsch and methanol synthesis loops
• Healthcare & Diagnostics: Breath analysis instrumentation for pulmonary function testing, where sub-ppm NH₃ serves as a biomarker for renal metabolism and gastric inflammation
• Research & Climate Science: Field-deployable modules for atmospheric boundary layer studies, agricultural NH₃ flux quantification using eddy covariance setups, and laboratory reactor kinetics validation

FAQ

Is the LGD F200 H suitable for use in explosive atmospheres?

Yes—when integrated with appropriate ATEX/IECEx-certified housing and barrier systems, the module complies with Zone 1/21 requirements for Group II (gas) and III (dust) hazardous locations.
Can it measure gases other than NH₃ and HCl?

The LGD F200 H is factory-configured for NH₃ and HCl only. Axetris offers alternative variants (e.g., LGD F200 CO, CH₄, HF) with laser diodes tuned to distinct absorption features—custom configurations require optical re-engineering and are subject to minimum order quantities.
Does the module require periodic zero/span calibration?

No. The TDLAS architecture inherently references its own laser wavelength and uses stable absorption line parameters; routine calibration is not required. However, users may perform optional performance verification using certified gas standards per ISO 14034.
What maintenance is needed for long-term operation?

No consumables or moving parts are present. Recommended preventive maintenance includes quarterly optical window inspection and cleaning using lint-free wipes and spectroscopic-grade isopropanol—particularly in high-particulate or oily environments.