FPI GT-IR Series Infrared Gas Detector with Alarm Function
| Brand | FPI |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Manufacturer |
| Country of Origin | Domestic (China) |
| Model | GT-IR |
| Pricing | Available Upon Request |
Overview
The FPI GT-IR Series Infrared Gas Detector is a fixed-mount, continuous-monitoring instrument engineered for reliable detection of carbon dioxide (CO₂) and hydrocarbon-based combustible gases—including methane (CH₄)—in industrial process environments. Utilizing non-dispersive infrared (NDIR) spectroscopy, the detector measures gas concentration by analyzing the characteristic absorption bands of target analytes in the mid-infrared region (typically 3–5 µm or 8–14 µm, depending on gas species). This optical principle eliminates sensor drift associated with electrochemical or catalytic bead technologies, delivering stable baseline performance over extended operational life. Designed for integration into plant-wide safety systems, the GT-IR series complies with IEC 60079-0 and IEC 60079-1 for explosive atmospheres and carries Ex d IIC T6 Gb certification—enabling safe deployment in Zone 1 and Zone 2 hazardous locations per ATEX and IECEx directives.
Key Features
- NDIR sensing architecture with dual-wavelength reference compensation, ensuring immunity to dust accumulation, humidity fluctuations, and ambient light interference
- Integrated temperature-compensated measurement module calibrated across operating range (−20 °C to +50 °C), maintaining accuracy under variable environmental conditions
- Field-serviceable design featuring infrared bidirectional remote control—enabling zero-contact configuration, zero-point adjustment, span calibration, and alarm threshold setting without opening the enclosure
- Embedded audible (≥85 dB @ 1 m) and visual (high-intensity LED strobe) alarm outputs compliant with IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) immunity standards
- Robust aluminum alloy housing rated IP66, corrosion-resistant finish suitable for chemical processing, oil & gas, biogas upgrading, and wastewater treatment facilities
- Expected operational lifetime ≥5 years under continuous duty cycle, with no consumables or electrolyte replacement required
Sample Compatibility & Compliance
The GT-IR Series is validated for quantitative detection of CO₂ (0–100% vol) and CH₄ (0–100% LEL or 0–5% vol), with cross-sensitivity profiles characterized against common interferents including H₂O vapor, CO, NOₓ, and volatile organic compounds (VOCs). All units undergo factory calibration traceable to NIST-certified gas standards. Regulatory compliance includes GB 15322.1–2019 (Chinese standard for combustible gas detectors), EN 50194-1 (domestic and industrial gas alarm systems), and alignment with functional safety requirements per IEC 61508 SIL 2 for safety-related applications. Documentation supports GLP/GMP audit readiness, including calibration certificates, test reports, and explosion-proof certification files.
Software & Data Management
The detector supports analog 4–20 mA output with HART protocol (version 7.5) for seamless integration into DCS, PLC, or SCADA platforms. Optional Modbus RTU/ASCII over RS-485 enables multi-drop network configuration. Configuration and diagnostics are performed via FPI’s proprietary IR-Link software, which logs calibration history, alarm events, and maintenance timestamps with tamper-evident digital signatures. Audit trail functionality meets basic data integrity expectations aligned with FDA 21 CFR Part 11 principles—though full electronic signature capability requires external validation of the host system.
Applications
- Continuous monitoring of biogas composition in anaerobic digesters and landfill gas recovery systems
- Leak detection in natural gas distribution infrastructure, compressor stations, and LNG terminals
- Safety interlock for CO₂ enrichment zones in food packaging lines and controlled-atmosphere storage facilities
- Process gas purity verification in syngas production, hydrogen reforming, and ammonia synthesis loops
- Confined space entry pre-check in utility tunnels, pump stations, and underground substations
FAQ
What gases does the GT-IR Series detect?
The GT-IR Series is optimized for CO₂ and CH₄; custom configurations for other IR-active gases (e.g., SF₆, refrigerants R-134a, R-410A) are available upon request.
Is the device certified for use in Zone 0 areas?
No. The GT-IR Series holds Ex d IIC T6 Gb certification, approved only for Zone 1 and Zone 2 hazardous locations per IEC 60079-10-1.
Can the detector operate in high-humidity environments?
Yes. The optical path incorporates hydrophobic coating and internal desiccant, and the temperature-compensation algorithm corrects for water vapor spectral overlap in real time.
Does it support third-party calibration gas standards?
Yes. Calibration is compatible with ISO 6141-certified gas mixtures from accredited providers; certificate of analysis must accompany each calibration event.
What is the recommended calibration interval?
FPI recommends functional verification every 6 months and full calibration annually—or after exposure to concentrations exceeding 200% of full-scale range.
