Huayun GXH-3010E Portable NDIR CO₂ Analyzer with One-Touch Auto-Zero Function
| Brand | Huayun Instruments |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Model | GXH-3010E |
| Measurement Principle | Non-Dispersive Infrared (NDIR) |
| Detection Range | 0–0.500% or 0–1.000% CO₂ (customizable) |
| Resolution | 0.001% |
| Repeatability | ≤1% FS |
| Zero Drift | ≤±2% FS/h |
| Span Drift | ≤±2% FS/3h |
| Temperature Error | ≤±2% FS/10°C (10–45°C) |
| CO Interference | ≤±0.3% FS at 1250 mg/m³ CO |
| Warm-up Time | ≤10 min |
| Response Time (t₀–t₉₀) | ≤15 s |
| Sample Flow Rate | 0.5–1.0 L/min |
| Power Supply | AC 220 V (±10%) or rechargeable internal battery |
| Dimensions | 210 × 165 × 85 mm |
| Weight | ≤2.0 kg |
Overview
The Huayun GXH-3010E is a portable, field-deployable non-dispersive infrared (NDIR) carbon dioxide analyzer engineered for high-fidelity ambient and occupational air quality monitoring. It operates on the fundamental principle of selective absorption of infrared radiation at 4.26 µm—the characteristic vibrational absorption band of CO₂ molecules—enabling direct, interference-compensated quantification without chemical reagents or consumables. Designed to meet stringent regulatory requirements for indoor air quality (IAQ), workplace hygiene, and environmental health assessments, the GXH-3010E complies with GB/T 18204.2–2014 (Public Place Hygiene Inspection Methods – Part 2: Chemical Contaminants), GBZ/T 300.37–2017 (Workplace Air Toxic Substances Determination – Part 37: Carbon Monoxide and Carbon Dioxide), and JJG 635–2011 (Verification Regulation for CO/CO₂ Infrared Gas Analyzers). Its performance conforms to Class II accuracy specifications defined in Chinese national metrological standards, and it is eligible for formal calibration certification issued by the National Institute of Metrology (NIM), P.R. China.
Key Features
- One-touch auto-zero function enabled by an integrated zero-filter and six-port valve manifold—eliminates manual zero adjustment and reduces operator dependency.
- Dual-range configuration (0–0.500% or 0–1.000% CO₂) with optional factory customization to match site-specific measurement needs.
- Internal sampling pump ensures consistent, pressure-stabilized flow across the optical path (0.5–1.0 L/min), supporting reproducible NDIR signal acquisition.
- Low thermal drift design: temperature-induced error limited to ≤±2% full scale per 10°C within 10–45°C operating range—critical for uncontrolled field environments.
- Rapid system response: t₀–t₉₀ ≤15 seconds enables real-time tracking of transient CO₂ fluctuations during ventilation audits or occupancy studies.
- Robust portable architecture: compact housing (210 × 165 × 85 mm), ≤2.0 kg mass, and dual-power capability (AC mains or rechargeable Li-ion battery) facilitate extended battery-powered surveys.
Sample Compatibility & Compliance
The GXH-3010E is validated for direct analysis of undiluted ambient air, indoor breathing-zone samples, and workplace air matrices. It exhibits minimal cross-sensitivity to CO—≤±0.3% full scale at 1250 mg/m³—ensuring reliable CO₂ quantification in mixed-gas environments such as industrial settings where combustion byproducts coexist. The instrument’s metrological traceability aligns with national verification protocols (JJG 635–2011), and its measurement uncertainty budget satisfies GLP-aligned documentation requirements for routine environmental monitoring programs. While not certified to ISO/IEC 17025 for accredited testing laboratories, its documented repeatability (≤1% FS) and stability metrics support use in compliance-driven applications governed by GBZ/T 300 series occupational exposure limit (OEL) assessments.
Software & Data Management
Data output is provided via analog voltage (0–5 V or 4–20 mA) and RS232 serial interface, enabling integration with building management systems (BMS), data loggers, or custom SCADA platforms. No proprietary software is bundled; raw concentration values (in % CO₂) and status flags (e.g., zero-valid, flow-alert) are transmitted in ASCII format with configurable baud rate and framing. Internal memory is not implemented—field users are expected to record readings manually or interface externally. For audit readiness, all operational parameters (including zero/span history, battery voltage, and pump runtime) can be logged externally with timestamping. The device supports basic traceability under GLP frameworks when used with controlled procedural documentation, though it does not implement FDA 21 CFR Part 11 electronic signature or audit-trail functionality.
Applications
- Indoor air quality assessment in offices, schools, hospitals, and public transport hubs per GB/T 18204.2–2014 ventilation adequacy criteria.
- Occupational hygiene monitoring in manufacturing, welding, fermentation, and confined-space entry scenarios per GBZ/T 300.37–2017 exposure evaluation protocols.
- Field validation of HVAC system performance—including demand-controlled ventilation (DCV) commissioning and duct leakage diagnostics.
- Educational and vocational training in environmental science and occupational safety curricula requiring portable, hands-on gas analysis tools.
- Baseline CO₂ mapping for green building certification (e.g., LEED IEQ credit documentation) where calibrated, NDIR-based instruments are specified.
FAQ
Does the GXH-3010E require external calibration gases for routine operation?
No—its one-touch auto-zero function uses an internal catalytic filter to generate zero-air reference, eliminating the need for bottled zero gas. Span calibration is recommended annually using certified CO₂-in-N₂ standard gas (e.g., 0.250% CO₂) per JJG 635–2011 verification procedure.
Can the measurement range be modified in the field?
No—the range (0–0.500% or 0–1.000%) is configured at the factory and requires firmware-level reconfiguration by authorized service personnel. Users must specify required range prior to purchase.
Is the instrument suitable for continuous unattended monitoring?
It is designed for intermittent spot measurements (typical duty cycle: <2 hours/day). Continuous operation may accelerate battery depletion and increase thermal drift; for 24/7 deployment, external power and periodic zero verification are mandatory.
What maintenance is required to sustain metrological validity?
Monthly inspection of inlet filter and zero-filter lifespan (typically 6–12 months depending on particulate load), annual span verification, and biannual pump diaphragm replacement per manufacturer’s service schedule.
Does the GXH-3010E comply with international standards such as ISO 8573 or EN 13725?
No—it is certified exclusively to Chinese national standards (GB, GBZ/T, JJG). It is not CE-marked, nor does it hold ATEX or IECEx certification for hazardous area use.
