i-Lab UHN2-1 Ultra-High-Purity Nitrogen Generator
| Brand | i-Lab |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Nitrogen Generator |
| Nitrogen Generation Principle | Pressure Swing Adsorption (PSA) with Carbon Molecular Sieve (CMS) |
| Output Flow Rate | 2 L/min |
| Output Pressure Range | 0–7 bar |
| Nitrogen Purity | 99.999% |
| Noise Level | <45 dB(A) |
| Compliance | Designed for GC/GC-MS integration per ASTM D6346 & ISO 8573-1 Class 1 compressed air/nitrogen quality requirements |
| Safety Features | Overpressure protection, automatic pressure relief, thermal cut-off |
Overview
The i-Lab UHN2-1 Ultra-High-Purity Nitrogen Generator is an engineered solution for laboratories requiring continuous, on-demand nitrogen gas at ≥99.999% purity (5.0 grade) and ≤10 ppb O₂, ≤10 ppb H₂O, and ≤10 ppb total hydrocarbons. It employs a dual-tower Pressure Swing Adsorption (PSA) system utilizing high-selectivity carbon molecular sieve (CMS) modules—sourced from certified international suppliers—to separate nitrogen from ambient air. The process relies on differential adsorption kinetics: oxygen, CO₂, moisture, and trace contaminants are preferentially retained by the CMS under elevated pressure, while nitrogen passes through with minimal residence time. A precisely timed valve sequencing system alternates between adsorption and regeneration cycles, ensuring uninterrupted output. Integrated oil-free scroll compressors eliminate lubricant contamination risks, supporting compliance with ISO 8573-1:2010 Class 1 specifications for particulate, water, and oil content in instrument-grade gases. The UHN2-1 is purpose-built for gas chromatography (GC), gas chromatography–mass spectrometry (GC-MS), and electron capture detection (ECD) applications where baseline stability, retention time reproducibility, and detector sensitivity depend critically on gas purity and flow consistency.
Key Features
- Ultra-high-purity nitrogen output: ≥99.999% (5.0 grade), validated per ISO 8573-1 Annex B and ASTM D6346 methodology for trace impurity quantification
- SFP (Split-Flow Purification) technology: A proprietary staged flow distribution architecture that reduces initial startup time by up to 40%, minimizes CMS channeling, and extends column service life beyond 20,000 operational hours under standard lab conditions
- Precision mass-flow-controlled delivery: Digital closed-loop regulation maintains ±0.5% flow accuracy across the full 0–2 L/min range, independent of downstream backpressure fluctuations
- Low-noise operation: Acoustic enclosure with multi-layer damping and vibration-isolated compressor mounting achieves <45 dB(A) at 1 m distance—compliant with WHO and EU Directive 2003/10/EC workplace noise limits
- Integrated safety architecture: Dual redundant pressure transducers, fail-safe solenoid valves, thermal cutoff at 95°C, and autonomous depressurization within 3 seconds upon overpressure detection (>7.5 bar)
- Modular service design: CMS cartridges, pre-filters, and coalescing filters are user-replaceable without tools; mean time between maintenance (MTBM) exceeds 12 months at 8 h/day usage
Sample Compatibility & Compliance
The UHN2-1 delivers nitrogen meeting or exceeding the gas quality requirements specified in ASTM D6346 (Standard Practice for Determination of Trace Contaminants in Gaseous Nitrogen), USP (Gas Chromatography), and ICH Q5C (Stability Testing of Biotechnological/Biological Products). Its output is compatible with all major GC and GC-MS platforms—including Agilent, Thermo Fisher, Shimadzu, and Waters—without modification to carrier gas modules or detector interfaces. The generator supports simultaneous supply to up to three instruments via optional manifold kits with individual pressure regulators and particle filters (0.01 µm rated). All electrical components conform to IEC 61010-1:2010 for laboratory equipment safety; electromagnetic compatibility meets EN 61326-1:2013 Class B standards. Full audit trail capability—including pressure logs, runtime counters, and alarm history—is enabled when paired with i-Lab’s optional GLP-compliant software module (validated per FDA 21 CFR Part 11).
Software & Data Management
The UHN2-1 embeds a dual-mode communication interface: RS-485 Modbus RTU for local SCADA integration and Wi-Fi/Ethernet for cloud-connected operation. The web-based i-Lab N-Guard™ interface provides real-time visualization of inlet pressure, tower differential pressure, outlet purity estimates (calculated via thermal conductivity sensor fusion), and cumulative runtime. Remote firmware updates, configuration backups, and predictive CMS saturation alerts are supported. For regulated environments, optional 21 CFR Part 11-compliant software includes electronic signatures, role-based access control (RBAC), and immutable audit trails with SHA-256 hashing of all critical events. Data export is available in CSV and PDF formats, with timestamped metadata aligned to ISO/IEC 17025:2017 clause 7.7.2 requirements for measurement traceability.
Applications
- Carrier gas for capillary GC and GC-MS systems requiring ultra-low oxygen and moisture content to prevent column degradation and detector drift
- Make-up gas and collision gas in triple quadrupole (QQQ) and high-resolution accurate-mass (HRAM) mass spectrometers
- Blank gas for purge-and-trap (P&T) and headspace (HS) sample introduction systems
- Zero-air generation support when integrated with catalytic oxidizers for VOC calibration standards
- Controlled-atmosphere packaging validation and inerting protocols in pharmaceutical stability chambers
- Calibration gas blending systems requiring stable, low-impurity nitrogen base gas
FAQ
What is the expected lifetime of the carbon molecular sieve (CMS) under normal operating conditions?
CMS lifetime is rated at ≥20,000 hours (≈2.3 years of continuous operation) when inlet air meets ISO 8573-1 Class 4:2010 specifications (≤0.3 µm particles, ≤3 mg/m³ oil aerosol, dew point ≤3°C). Pre-filter replacement every 6 months is mandatory to sustain this rating.
Can the UHN2-1 be integrated into an existing laboratory building management system (BMS)?
Yes—via Modbus RTU over RS-485, it supports read-only access to 12 key parameters including outlet pressure, flow rate, temperature, and fault codes, enabling seamless integration with Schneider EcoStruxure, Siemens Desigo, or Honeywell Experion BMS platforms.
Is external cooling or ventilation required?
No active cooling is needed; however, ambient temperature must remain between 15–30°C with ≥30 cm clearance on all sides for convection airflow. Installation in enclosed cabinets is not recommended due to heat accumulation risk.
Does the generator require periodic third-party certification for regulatory audits?
While no mandatory annual certification exists for nitrogen generators, i-Lab provides a factory-issued Certificate of Conformance (CoC) with each unit, plus optional UKAS-accredited purity verification reports (per ISO/IEC 17025) upon request for GLP/GMP submissions.
