Ailun AL-3015F Dual-Gas Infrared CO/CO₂ Analyzer

Overview

The Ailun AL-3015F Dual-Gas Infrared CO/CO₂ Analyzer is a portable, field-deployable instrument engineered for simultaneous quantitative measurement of carbon monoxide (CO) and carbon dioxide (CO₂) in ambient air and workplace environments. It employs non-dispersive infrared (NDIR) spectroscopy — a well-established, interference-resistant optical detection method standardized under GB/T 9801–1988 and GBZ/T 300.37–2017. Each gas channel utilizes dedicated, thermally stabilized NDIR detectors with narrow-band optical filters tuned to the fundamental absorption bands of CO (around 4.6 µm) and CO₂ (around 4.26 µm), ensuring high selectivity and minimal cross-sensitivity. The integrated sampling pump enables active draw-through operation at controlled flow rates (0.5–2.0 L/min), supporting consistent sample presentation across variable environmental conditions. Designed for compliance with Class II metrological requirements per JJG 635–2011, the AL-3015F delivers traceable performance suitable for occupational hygiene monitoring, indoor air quality (IAQ) assessment, HVAC commissioning, and industrial hygiene surveys where regulatory-grade documentation is required.

Key Features

• Simultaneous dual-gas measurement of CO and CO₂ using independent NDIR optical paths with temperature-compensated detectors
• Configurable CO range options: 0.0–50 ppm (standard), extendable to 0.0–100 ppm or 0.0–200 ppm; CO₂ ranges: 0.0–0.500% or 0.0–1.000% vol
• High-resolution display: 0.1 ppm for CO, 0.001% vol for CO₂, with automatic unit conversion (ppm ↔ mg/m³) based on user-defined temperature and pressure
• Real-time environmental monitoring: integrated sensors for ambient temperature (5–40 °C) and relative humidity (10–95% RH)
• Color touchscreen interface with dynamic data refresh every second, showing instantaneous values, 1-h/8-h/24-h time-weighted averages, zero reference, battery status, Wi-Fi connectivity, and SD card storage health
• Automated zero calibration cycle with drift compensation logic; manual zero adjustment available for field verification under varying seasonal conditions
• Robust data management: onboard storage for 5,000 timestamped records plus expandable microSD card capacity for long-term logging

Sample Compatibility & Compliance

The AL-3015F is validated for direct analysis of undiluted ambient air, indoor breathing zone samples, and low-humidity industrial process streams. It meets the interference tolerance criteria specified in JJG 635–2011: signal deviation from 500 mg/m³ CO₂ or saturated water vapor at room temperature remains within ±2% FS. The instrument conforms to national metrological verification protocols for Class II infrared gas analyzers and supports traceability to China’s National Institute of Metrology (NIM). While not certified to ISO 12039 or EN 14625, its NDIR architecture and documented linearity (≤±2% FS), repeatability (≤1% FS), and thermal stability align with internationally accepted best practices for fixed and portable CO/CO₂ monitoring in occupational and environmental applications.

Software & Data Management

Data acquisition and reporting are supported through three interoperable layers: (1) Local device interface with real-time averaging algorithms (TWA calculations per OSHA/ACGIH conventions), (2) Wi-Fi access point mode enabling direct smartphone connection via a dedicated iOS/Android application — no cellular data required — for live viewing, historical retrieval, and export in CSV format, and (3) Optional cloud upload via configurable Wi-Fi network to secure TLS-encrypted endpoints. All stored measurements include full metadata: date/time stamp, instrument ID, ambient T/RH, pump flow rate, and calibration event flags. Audit-ready features include tamper-evident timestamps and immutable record structure — compatible with GLP-aligned workflows requiring data integrity documentation.

Applications

• Workplace exposure assessment per GBZ 2.1–2019 and OSHA PEL guidelines
• Indoor air quality audits in offices, schools, hospitals, and residential buildings
• Combustion safety verification during boiler, furnace, and generator maintenance
• Post-remediation validation following CO incident investigations
• Field validation of fixed CO/CO₂ sensor networks and building automation systems
• Educational use in environmental science and occupational safety laboratories

FAQ

What gas detection principle does the AL-3015F employ?
It uses non-dispersive infrared (NDIR) spectroscopy with dual-wavelength optical detection optimized for CO and CO₂ absorption bands.
Is the instrument suitable for outdoor field use?
Yes — it operates reliably between 5–40 °C and 10–95% RH, with a ruggedized enclosure and internal rechargeable battery supporting up to 4 hours of continuous operation.
Can measurement units be automatically converted?
Yes — concentration readings switch dynamically between ppm and mg/m³ using real-time temperature and pressure inputs.
Does the device support remote data access without internet?
Yes — via Wi-Fi hotspot mode, enabling direct smartphone connection and local data download without cellular data or external network dependency.
How frequently must zero calibration be performed?
The analyzer performs scheduled automatic zero checks; however, manual zero adjustment is recommended before critical measurements or after extended storage or transport.