Huayun GXH-3010H Handheld NDIR Carbon Dioxide Analyzer

Overview

The Huayun GXH-3010H Handheld NDIR Carbon Dioxide Analyzer is a field-deployable, single-component gas measurement instrument engineered for high-reliability CO₂ quantification in ambient air, indoor environments, occupational hygiene settings, and ventilation assessment applications. It employs non-dispersive infrared (NDIR) spectroscopy—the industry-standard optical absorption technique for CO₂ detection—leveraging the molecule’s strong and unique absorption band near 4.26 µm. The analyzer utilizes a dual-beam optical path design with a thermopile detector and temperature-stabilized IR source to ensure long-term signal stability and minimize thermal drift effects. Built-in zero calibration is achieved via an integrated chemical filter that removes CO₂ from the sample stream, enabling trace-level baseline correction without external gas cylinders. This one-touch zero function initiates automatic filtration, baseline acquisition, and return to measurement mode within seconds—eliminating manual valve switching and reducing operator error. The device meets the technical requirements for Class II analytical instruments per Chinese national metrological standards and is fully compliant with GB/T 18204.2–2014 (Public Place Hygiene Testing), GBZ/T 300.37–2017 (Workplace Air Toxic Substance Determination), and JJG 635–2011 (Verification Regulation for CO/CO₂ Infrared Gas Analyzers).

Key Features

• One-touch zero calibration with integrated CO₂ scrubber filter—no external zero gas required
• NDIR optical architecture with temperature-compensated detection for stable performance across 10–45 °C
• Integrated sampling pump with adjustable flow control (0.5–1.0 L/min) ensuring consistent sample delivery
• High-resolution display showing real-time CO₂ concentration (0.001% resolution) and diagnostic status indicators
• Robust portable housing (200 × 95 × 35 mm; ≤500 g) with IP54-rated ingress protection for field use
• Dual power operation: rechargeable lithium-ion battery (≥6 h continuous use) or AC adapter (220 V ±10%)
• Low thermal drift design: zero drift ≤±2% FS/h and span drift ≤±2% FS/3 h under specified conditions

Sample Compatibility & Compliance

The GXH-3010H is validated for direct analysis of ambient and indoor air matrices without pre-conditioning. It exhibits minimal cross-sensitivity to CO (≤±0.3% FS at 1250 mg/m³), methane (<0.1% FS at 10,000 ppm), and water vapor (with internal humidity compensation). The instrument is designed for routine compliance monitoring in accordance with national occupational exposure limits (OELs) and indoor air quality guidelines. Its metrological traceability is supported by verification against certified reference gases and alignment with JJG 635–2011—enabling issuance of calibration certificates from the National Institute of Metrology (NIM), China. While not FDA 21 CFR Part 11 or ISO/IEC 17025 accredited out-of-the-box, its documented linearity (≤±2% FS), repeatability (≤1% FS), and response time (t₀–t₉₀ ≤15 s) meet data integrity expectations for GLP-aligned environmental surveys and HVAC commissioning reports.

Software & Data Management

The GXH-3010H operates as a standalone instrument with no embedded software stack or Bluetooth/Wi-Fi connectivity. All measurements are displayed locally on a high-contrast LCD screen with backlighting. Timestamped readings can be manually recorded or exported via optional RS232 interface (not standard) to external logging devices or PCs using terminal emulation software. No proprietary drivers or cloud platforms are required. Data output format is ASCII-based serial transmission (9600 bps, 8-N-1), supporting integration into custom SCADA or laboratory information management systems (LIMS) where regulatory workflows mandate audit trails. For full traceability in regulated environments, users are advised to pair the instrument with a validated paper logbook or electronic lab notebook (ELN) that captures operator ID, location, date/time, and environmental conditions per GLP principles.

Applications

• Indoor air quality (IAQ) audits in offices, schools, hospitals, and museums per ASHRAE 62.1 and GB/T 18883–2002
• Occupational hygiene monitoring in confined spaces, welding zones, fermentation facilities, and greenhouses
• Validation of demand-controlled ventilation (DCV) system performance in building commissioning
• Field verification of CO₂ scrubber efficiency in life-support systems and rebreathers
• Educational demonstrations of gas laws, respiration physiology, and climate-related CO₂ dynamics
• Baseline screening during environmental site assessments prior to stationary source emission testing

FAQ

Does the GXH-3010H require external zero gas for calibration?
No. It uses an internal chemical CO₂ scrubber filter for automatic one-touch zero calibration—no bottled zero air or gas cylinders are needed.
Can this analyzer measure CO₂ in high-humidity environments?
Yes. The optical path includes passive humidity compensation, and performance specifications account for operation at up to 90% RH within the 10–45 °C range.
Is the instrument suitable for outdoor ambient air monitoring?
It is designed for short-term spot checks and mobile surveys—not continuous unattended operation. For fixed-site ambient networks, consider rack-mounted NDIR analyzers with weatherproof enclosures and telemetry.
What documentation accompanies the unit for metrological traceability?
Each unit ships with a factory calibration report referencing NIM-traceable standards. Upon request, users may obtain a formal verification certificate from the National Institute of Metrology (China) per JJG 635–2011.
How often should zero calibration be performed during extended use?
Recommended before each measurement session and after significant ambient temperature shifts (>5 °C); the built-in zero function takes <10 seconds to complete.