Huayun GXH-3011B Portable NDIR Carbon Monoxide Analyzer

Overview

The Huayun GXH-3011B Portable NDIR Carbon Monoxide Analyzer is a field-deployable, single-component gas analyzer engineered for precise, real-time measurement of carbon monoxide (CO) concentration in ambient air, indoor environments, occupational workspaces, and fixed emission sources. It operates on the principle of non-dispersive infrared (NDIR) spectroscopy — leveraging the characteristic absorption band of CO near 4.6 µm — to deliver selective, interference-resistant quantification without chemical reagents or consumables. Designed in strict compliance with national metrological and environmental standards, the instrument holds China’s CPA (Certified Pattern Approval) certificate and satisfies JJG 635–2011 verification requirements for Class II infrared gas analyzers. Its optical path architecture, temperature-stabilized detector, and integrated zero-reference filter ensure long-term stability under variable environmental conditions. The GXH-3011B is not intended for CO₂ analysis; it is optimized exclusively for CO detection with trace-level sensitivity and robust performance in regulatory monitoring workflows.

Key Features

• True portable form factor: Compact housing (255 × 215 × 92 mm), weight ≤3.9 kg, and dual-power operation (AC mains or built-in rechargeable Li-ion battery) enable extended field use without external power infrastructure.
• NDIR optical core with high-selectivity 4.6 µm bandpass filtering and thermopile detection, minimizing cross-sensitivity to CO₂, CH₄, and water vapor under typical sampling conditions.
• Integrated zero-calibration system: Built-in catalytic zero-filter enables one-touch automatic zeroing at ambient conditions — eliminating need for external zero gas cylinders during routine operation.
• Intuitive color touchscreen interface with on-device unit conversion (ppm ↔ mg/m³ at standard temperature and pressure), real-time trend display, and configurable averaging modes (hourly/daily mean calculation).
• Dual USB interfaces support direct data export via USB flash drive and PC connectivity for firmware updates or advanced configuration using dedicated Windows-based transmission software.
• Configurable range options: Standard range (0–50.0) × 10⁻⁶ v/v; optional extended range (0–200.0) × 10⁻⁶ v/v or custom industrial range (0–5.00)% v/v for stack emission testing — all factory-calibrated and traceable to NIM (National Institute of Metrology, China) standards.

Sample Compatibility & Compliance

The GXH-3011B is validated for gaseous samples with particulate loading <1 µm and dew point <5 °C. It complies with multiple Chinese national and industry standards governing CO measurement accuracy, repeatability, and metrological traceability. These include GB/T 18204.2–2014 (public health chemical pollutants), GBZ/T 300.37–2017 (occupational toxic substances), GB/T 9801–1988 (ambient air CO by NDIR), HJ 965–2018 (automated ambient CO monitoring), and HJ/T 44–1999 (stack CO emissions). As a Class II certified instrument per JJG 635–2011, it meets mandatory requirements for field calibration verification, including zero drift, span drift, linearity, and response time. While not FDA 21 CFR Part 11–compliant out-of-the-box, audit-ready data logs (timestamped, immutable, with operator ID fields) can be exported for GLP/GMP-aligned QA documentation upon request.

Software & Data Management

Data acquisition and reporting are supported by Huayun’s proprietary PC software, compatible with Windows 10/11. The software imports binary log files from the device’s internal memory or USB drive, enabling spectral review (where applicable), statistical summary (min/max/mean/stdev), customizable report generation (PDF/CSV), and compliance flagging against user-defined thresholds. All stored records contain UTC timestamps, instrument serial number, battery level, flow rate, and calibration status metadata. Firmware versioning, parameter backup/restore, and remote diagnostics are accessible via USB-CDC mode. No cloud connectivity or SaaS dependency is required — all processing occurs locally to preserve data sovereignty and meet institutional IT security policies.

Applications

• Ambient air quality monitoring networks (urban, roadside, background stations)
• Indoor air quality (IAQ) assessment in schools, hospitals, offices, and residential buildings
• Occupational hygiene surveys per GBZ 159 and OSHA PEL equivalency protocols
• Stack emission testing at thermal power plants, incinerators, and industrial boilers (with optional high-concentration range)
• Emergency response and leak investigation in confined spaces or post-fire scenarios
• Method validation and reference instrument support in metrology laboratories accredited to CNAS/ISO/IEC 17025

FAQ

Is the GXH-3011B suitable for continuous unattended monitoring?
Yes — when powered by AC and mounted in a stable environment with controlled humidity (<60% RH), it supports 7-day autonomous logging at 1-minute intervals. Battery runtime is ~6 hours at 2-L/min flow and active display.
Can the instrument be calibrated using certified gas standards?
Yes — two-point calibration (zero and span) is supported using NIST-traceable CO standards (e.g., 10 ppm ±2% in N₂). Calibration coefficients are stored in non-volatile memory with date/time stamping.
Does it meet international standards such as ISO 4037 or EN 14625?
No — it is designed and certified specifically to Chinese national standards (GB, HJ, JJG). For EU or North American deployments, third-party verification against ISO 12039 or ASTM D6348 may be arranged separately.
What maintenance is required beyond periodic calibration?
Annual optical path inspection and pump filter replacement are recommended. The internal desiccant cartridge should be replaced every 12 months or after 2,000 operating hours.
Is Bluetooth printing supported natively or via adapter?
Bluetooth 4.2 module is optional and factory-installed; it pairs with standard ESC/POS-compatible thermal printers. Driver-free operation is confirmed with Zebra, Star, and Bixolon models.