Ailun AL-HW6010 Dual-Channel NDIR CO and CO₂ Analyzer

Overview

The Ailun AL-HW6010 Dual-Channel Non-Dispersive Infrared (NDIR) CO and CO₂ Analyzer is a portable, field-deployable gas measurement instrument engineered for simultaneous, real-time quantification of carbon monoxide (CO) and carbon dioxide (CO₂) in ambient air and indoor environments. Based on dual-beam, single-detector NDIR spectroscopy—optimized for the characteristic absorption bands at 4.6 µm (CO) and 4.26 µm (CO₂)—the analyzer delivers stable, interference-resistant detection without optical filters or moving parts. Its design complies with key Chinese national standards including GB/T 18204.2–2014 (Public Place Hygiene Inspection Methods), GB/T 9801–1988 (Ambient Air – Determination of Carbon Monoxide by NDIR), and JJG 635–2011 (Verification Regulation for Infrared CO/CO₂ Gas Analyzers). As a Class II certified metrological instrument per CNAS-accredited verification protocols, it supports traceable calibration and is eligible for official secondary-level calibration certificates issued by the National Institute of Metrology (NIM), China.

Key Features

• Dual-channel NDIR detection architecture with independent optical paths and temperature-stabilized detectors for CO and CO₂, minimizing cross-sensitivity and thermal drift.
• Integrated sampling pump with adjustable flow control (0.5–2.0 L/min), enabling active draw from distances up to 30 meters via flexible sampling tubing.
• 7-inch high-resolution color touchscreen interface with intuitive icon-based navigation, supporting multilingual UI (English default) and real-time graphical trend display.
• Triple-unit data presentation: automatic switching between ppm, mg/m³, and % volume concentration—calculated using standard temperature/pressure (STP) and molecular weight inputs per IUPAC conventions.
• Onboard auto-zero calibration function with programmable schedule (e.g., daily, pre-measurement), compensating for seasonal ambient fluctuations without external zero gas.
• Time-weighted averaging modes: hourly mean, 8-hour TWA (Time-Weighted Average), and 24-hour daily mean—aligned with occupational exposure limit (OEL) assessment frameworks per GBZ 2.1–2019 and ACGIH TLV® guidelines.
• Internal data logger with ≥10,000 measurement records, timestamped with UTC-synced clock and stored with full metadata (temperature, humidity, flow rate, battery status).

Sample Compatibility & Compliance

The AL-HW6010 is validated for direct analysis of undiluted ambient air, indoor workplace air, HVAC duct samples, and low-humidity exhaust streams (RH < 90%, non-condensing). It exhibits negligible interference from common atmospheric constituents: CO cross-sensitivity remains ≤±0.3% F.S. even under extreme CO challenge (1250 mg/m³), and water vapor interference is actively compensated via integrated humidity sensing (±3% RH accuracy) and algorithmic correction. The instrument meets structural and performance requirements for Class II environmental monitoring equipment per China’s JJF 1001–2011 General Metrological Terminology, and its electrical safety conforms to GB 4793.1–2007 (IEC 61010-1 equivalent). While not intrinsically safe, it is rated for use in non-hazardous locations (IP20 enclosure).

Software & Data Management

Data export is supported via RS232 serial interface with included PC software (Windows 10/11 compatible), enabling raw data download, report generation (PDF/CSV), and batch calibration coefficient updates. The software implements audit-trail functionality—recording user login, parameter changes, calibration events, and data exports—with timestamps and operator ID fields. Though not FDA 21 CFR Part 11 compliant out-of-the-box, the system architecture permits integration into GLP/GMP workflows via external validation protocols and electronic signature add-ons. Optional Bluetooth 4.2 module enables wireless thermal printing (compatible with Zebra ZQ510 series) for field documentation without PC dependency.

Applications

• Indoor air quality (IAQ) audits in schools, offices, hospitals, and public transport hubs per ISO 16814 and ASHRAE Standard 62.1.
• Occupational hygiene monitoring for CO exposure compliance (OSHA PEL: 50 ppm; China MAC: 30 mg/m³) and CO₂ demand-controlled ventilation (DCV) verification.
• Environmental baseline surveys near traffic corridors, industrial perimeters, and landfill sites.
• Validation of combustion efficiency in boiler rooms and kitchen ventilation systems via CO/CO₂ ratio analysis.
• Educational laboratory use for teaching gas law principles, infrared absorption spectroscopy, and sensor metrology fundamentals.

FAQ

What calibration gases are required for routine verification?
Certified zero air (≤0.1 ppm CO, ≤400 ppm CO₂) and span gases traceable to NIM or NIST standards (e.g., 25 ppm CO in N₂, 0.25% CO₂ in N₂) are recommended for biannual verification. Internal zero calibration eliminates daily zero-gas dependency.
Can the measurement range be extended beyond factory defaults?
Yes—custom ranges are available upon request (e.g., CO: 0–1000 ppm; CO₂: 0–5% vol), subject to optical path recalibration and updated firmware configuration.
Is humidity compensation applied automatically during measurement?
Yes—the integrated capacitive humidity sensor (0–95% RH) feeds real-time correction coefficients into the NDIR signal processing algorithm, reducing water vapor-induced bias to <±0.5% F.S. across 10–45°C.
How long does the instrument retain calibration stability after field deployment?
Under typical operating conditions (20–30°C, <70% RH), zero and span stability meet ≤±2% F.S. drift specifications for ≥72 hours; verified per JJG 635–2011 interval testing protocol.
Does the device support external power for continuous operation?
Yes—DC 12 V input (via barrel jack) enables uninterrupted operation during fixed-site monitoring; internal Li-ion battery provides ≥6 hours runtime at 1 L/min flow.