HengaoDe HAD-17878 Portable NDIR CO₂ and CO Analyzer with Integrated Environmental Sensors, 30L Pure Water System HAD-SE-II, LED UV-A Blacklight Lamp H4020-6K, and T3/T30/T2000 Constant-Flow Air Samplers

Overview

The HengaoDe HAD-17878 is a dual-gas portable non-dispersive infrared (NDIR) analyzer engineered for simultaneous, real-time quantification of carbon dioxide (CO₂) and carbon monoxide (CO) in ambient air, occupational environments, and public health settings. Its measurement principle relies on selective absorption of infrared radiation at characteristic wavelengths—4.26 µm for CO₂ and 4.67 µm for CO—within a temperature-stabilized optical cell. Paired with integrated environmental sensors (temperature, relative humidity, atmospheric pressure), the instrument applies dynamic compensation algorithms per ISO 8573-1 and ASTM D6245 to minimize drift caused by ambient fluctuations. The system complies with JJG 635–2011, HJ 965–2018, GB/T 18204.2–2014, and GBZ/T 300.37–2017, supporting regulatory reporting for workplace exposure assessments (e.g., OSHA PELs, ACGIH TLVs) and indoor air quality (IAQ) audits. Complementing this core gas analyzer are three purpose-built ancillary instruments: the HAD-SE-II 30L ultrapure water system (resistivity ≥18.25 MΩ·cm @ 25°C, TOC <10 ppb), the H4020-6K handheld UVA blacklight (365 nm ±3 nm, 6000 µW/cm² @ 380 mm, ASTM E3022 compliant), and a family of constant-flow air samplers (HAD-T3, HAD-T30, HAD-T2000) validated per JJG 956–2013 and GBZ/T 300–2017.

Key Features

• NDIR optical architecture with dual-band detection: independent CO₂ (0–5000 ppm) and CO (0–1000 ppm) channels, each featuring thermoelectrically stabilized detectors and reference cells for <1% FS/h zero drift.
• Integrated environmental compensation: onboard temperature (±0.3°C), RH (±2% RH), and barometric pressure (±0.5 kPa) sensors feed real-time correction into concentration calculations per ISO 16000-22.
• Field-deployable design: 6.0 kg mass, 255×165×340 mm footprint, and >4 h battery life (Li-ion, 7.4 V) enable mobile monitoring without external power dependency.
• Comprehensive data handling: 10,000-point internal memory, USB 2.0 interface, and GLP-compliant audit trail (user ID, timestamp, calibration events, sensor diagnostics).
• HAD-SE-II pure water system: dual-stage RO + mixed-bed deionization, resistivity monitoring (LCD display), automatic low-pressure shutdown, and leak-proof quick-connect fittings meeting GLP water purity requirements for IC, HPLC, and trace metal analysis.
• H4020-6K UV lamp: calibrated UVA output (6000 µW/cm²), <20 lux visible light leakage, and thermal management ensuring <8 K surface temperature rise—validated for fluorescent penetrant inspection (FPI) and hydrocarbon residue detection.
• T-series air samplers: electronic mass-flow control with digital PID regulation, maintaining ≤±5% flow accuracy across variable filter loading and voltage fluctuations (220 VAC or DC 7.4 V).

Sample Compatibility & Compliance

The HAD-17878 analyzer is validated for gaseous sampling in non-explosive, non-corrosive atmospheres (IEC 60079-0 Class II, Group IIA). It supports direct pump-suction sampling up to 30 m via PTFE tubing (ID 4 mm), compatible with standard Tedlar® bags and stainless-steel canisters for archival analysis. The HAD-SE-II produces Type I ultrapure water conforming to ISO 3696:1987 and CLSI EP21-A guidelines, suitable for reagent preparation in clinical chemistry and environmental testing labs. The H4020-6K lamp meets ASTM E3022–18 for aerospace FPI and ASTM D7575 for oil-in-water detection. All air samplers comply with EN 1232 (for personal sampling pumps) and support certified collection media—including PVC filters (for metals), XAD-2 resin (for VOCs), and gelatin capsules (for bioaerosols)—under GBZ/T 192 series and NIOSH Method 0500.

Software & Data Management

Data acquisition and reporting are managed through HengaoDe’s proprietary PC software (Windows 10/11 compatible), which supports FDA 21 CFR Part 11 compliance via electronic signatures, role-based access control, and immutable audit logs. Raw measurements include timestamped CO₂/CO values (ppm, mg/m³, % vol), environmental parameters, and instrument status flags (e.g., “zero calibration active”, “flow out of spec”). Export formats include CSV, Excel (.xlsx), and PDF reports pre-formatted for EPA Form 5600–1 and OSHA Form 90. The HAD-SE-II logs water quality metrics (resistivity, TOC, temperature) with configurable alarm thresholds; the T-series samplers store cumulative volume, elapsed time, and pressure drop curves for post-hoc flow verification during GLP audits.

Applications

• Occupational hygiene: Real-time CO/CO₂ monitoring in confined spaces (tunnels, boiler rooms), welding zones, and vehicle maintenance bays per OSHA 1910.134 and EU Directive 2004/37/EC.
• Environmental QA/QC: Ambient air network stations performing continuous CO measurement per HJ 965–2018 and EPA Method TO-11A.
• Building science: IAQ assessments in schools, hospitals, and offices using 8-hour TWA and 30-minute averaging per ASHRAE Standard 62.1.
• Materials testing: Chloride permeability evaluation of epoxy-coated rebar using HAD-30312 diffusion cells per JG/T 502–2016.
• Corrosion engineering: Depth profiling of pitting corrosion on pipelines and storage tanks with HAD-TFS micrometer (0.001 mm resolution).
• Concrete durability assessment: In-situ resistivity mapping (0–3000 kΩ·cm range) to estimate chloride ingress rate and corrosion risk per ASTM C876.

FAQ

Does the HAD-17878 require external zero gas for calibration?

No—the instrument includes an integrated catalytic zero filter that chemically removes CO and CO₂ from ambient air, enabling on-site zero calibration without bottled zero gas.

Can the HAD-SE-II produce water suitable for LC-MS applications?

Yes—its TOC <10 ppb and endotoxin <0.001 EU/mL output meet ISO 14644-1 Class 5 cleanroom water specifications for high-sensitivity mass spectrometry.

Is the H4020-6K lamp calibrated traceable to NIST standards?

Each unit ships with a factory calibration certificate referencing NIST-traceable UV radiometers (NIST SRM 2032), with recalibration recommended annually.

What flow stability guarantees do the T-series samplers provide under high-resistance filter conditions?

All models maintain ≤±5% flow deviation at ≥35 kPa backpressure (T3/T2000) or ≥15 kPa (T30), verified per ISO 5355:2019 Annex B.

How does the HAD-17878 handle cross-interference from methane or water vapor?

Optical bandpass filters and dual-wavelength referencing suppress CH₄ interference to <0.5% of reading; humidity compensation uses real-time dew point calculation per ISO 4677-2.