GASXEL GXH-3010E Portable NDIR Carbon Dioxide Analyzer

Overview

The GASXEL GXH-3010E Portable NDIR Carbon Dioxide Analyzer is a field-deployable, single-component gas measurement instrument engineered for high-fidelity quantification of carbon dioxide (CO₂) in ambient air, indoor environments, occupational settings, and confined spaces. It operates on the principle of non-dispersive infrared (NDIR) spectroscopy—leveraging the characteristic absorption band of CO₂ near 4.26 µm. A broadband IR source emits radiation through a dual-beam optical path: one passes through the sample cell containing the gas stream; the other traverses a sealed reference chamber. A pyroelectric detector measures differential attenuation, enabling concentration calculation via Beer–Lambert law-based calibration. The integrated sampling pump ensures consistent volumetric flow (0.5–1.0 L/min), while the built-in zero-filter and six-port valve enable automated zeroing and measurement cycles without external calibration gases. Designed to meet stringent metrological requirements, the GXH-3010E complies with JJG 635–2011 (National Verification Regulation for CO/CO₂ Infrared Gas Analyzers) and satisfies technical criteria for Class II industrial-grade analyzers per Chinese national standards. It is validated for use in accordance with GB/T 18204.2–2014 (Public Place Hygiene Inspection Methods – Part 2: Chemical Pollutants) and GBZ/T 300.37–2017 (Workplace Air Toxic Substances Determination – Part 37: Carbon Monoxide and Carbon Dioxide).

Key Features

• True portable architecture: Compact form factor (210 × 165 × 85 mm), lightweight design (≤2.0 kg), and dual-power operation (AC mains or internal rechargeable Li-ion battery) support extended field deployment without infrastructure dependency.
• NDIR optical core with temperature-stabilized detector and dual-beam compensation, delivering robust immunity to optical contamination and long-term signal drift.
• Automated zero calibration sequence via integrated metal-oxide zero filter and precision six-port solenoid valve—eliminating manual zero-gas handling and minimizing operator intervention.
• High-resolution digital readout (0.001% v/v) with full-scale linearity error ≤±2% FS and repeatability ≤1.0% FS, meeting verification requirements for secondary-class analytical instrumentation.
• Fast dynamic response: t₀–t₉₀ ≤15 seconds under standard flow conditions, enabling real-time tracking of transient CO₂ fluctuations during ventilation studies or occupancy monitoring.
• Low cross-sensitivity to carbon monoxide: ≤±0.3% FS interference at 1250 mg/m³ CO, verified per JJG 635–2011 test protocols.

Sample Compatibility & Compliance

The GXH-3010E is optimized for direct analysis of undiluted ambient or workplace air samples. It accommodates particulate-laden or moderately humid streams (non-condensing) when used with optional hydrophobic inline filters. The analyzer does not require carrier gases, chemical reagents, or consumable sensors—ensuring low operational overhead and stable baseline performance across shifts. Regulatory alignment includes compliance with China’s mandatory verification regime (JJG 635–2011), public health surveillance standards (GB/T 18204.2–2014), and occupational exposure assessment guidelines (GBZ/T 300.37–2017). While not certified to IECEx or ATEX for hazardous area use, its electrical safety conforms to GB 4793.1–2019 (Equivalent to IEC 61010-1). Data integrity supports GLP-aligned workflows through traceable calibration logs and instrument identification embedded in output reports.

Software & Data Management

Data acquisition is managed via onboard firmware with real-time LCD display and timestamped storage of up to 10,000 measurement records (concentration, time, temperature, battery status). USB-C interface enables direct data export to PC in CSV format for post-processing in Excel, MATLAB, or environmental data management systems (EDMS). Firmware supports user-defined averaging intervals (1–60 s), alarm thresholds (programmable high/low limits), and auto-zero scheduling. Though no proprietary cloud platform is provided, exported datasets are compatible with common regulatory reporting templates—including those aligned with ISO 17025 documentation requirements and internal audit trails for QA/QC review.

Applications

• Indoor air quality (IAQ) assessment in schools, offices, hospitals, and transportation hubs per ASHRAE Standard 62.1 and GB/T 18883–2002.
• Occupational hygiene monitoring in breweries, greenhouses, fermentation facilities, and confined-space entry programs.
• Validation of HVAC system performance and demand-controlled ventilation (DCV) logic.
• Field verification of CO₂ scrubber efficiency and carbon capture pilot studies.
• Educational laboratories requiring portable, maintenance-light gas analysis platforms for undergraduate physical chemistry or environmental science curricula.

FAQ

Does the GXH-3010E require periodic recalibration with certified gas standards?
Yes—while the built-in zero filter and valve system enables frequent zero-point verification, full-span calibration using NIST-traceable CO₂ standard gas (e.g., 0.250% v/v in N₂) is recommended every 3–6 months or after exposure to extreme environmental conditions.
Can the measurement range be extended beyond 0–0.500%?
Yes—the instrument can be factory-configured for 0–1.000% v/v range; custom ranges up to 5.000% v/v are available upon request, subject to optical path modification and recalibration.
Is the device suitable for outdoor continuous monitoring?
It is designed for intermittent spot-checking and short-term logging (up to 8 hours on battery). For unattended multi-day deployment, an external power supply and weatherproof enclosure are required.
What is the service life of the internal IR source and detector?
The thermopile IR source and pyroelectric detector are rated for ≥5 years of typical field use (assuming ≤4 hrs/day operation); no user-replaceable optical components are intended—service is performed by authorized GASXEL technical centers.
Does the GXH-3010E support analog output or Modbus communication?
No—data output is limited to USB-C digital export. Analog (4–20 mA) or RS-485 Modbus RTU interfaces are not supported in this model variant.