ChemTron N2-Whisper Series Membrane-Based Nitrogen Generator

Overview

The ChemTron N2-Whisper Series is a membrane-based nitrogen generator engineered for continuous, on-demand supply of high-purity nitrogen gas in analytical and preparative laboratory environments. Unlike pressure swing adsorption (PSA) systems, the N2-Whisper utilizes proprietary hollow-fiber membrane separation technology—featuring 0.3 mm internal diameter fibers with a 40 nm selective layer—to separate nitrogen from compressed ambient air via differential permeation rates of O₂, H₂O, and CO₂. This passive, electroless process delivers stable, low-background nitrogen without electrical power consumption, electromagnetic interference, or moving parts—making it ideal for integration with sensitive instrumentation including LC/MS, GC detectors, nitrogen blow-down evaporators, and inert atmosphere glove boxes. Designed and manufactured in Germany, the system operates within an ambient temperature range of 10–35 °C and requires no external compressor; it is intended for connection to a certified, oil-free, desiccated compressed air source meeting ISO 8573-1 Class 2:2:2 (solid particles, water, oil).

Key Features

• Electroless operation: Zero power consumption, zero EMI, zero background noise—critical for mass spectrometry and low-signal detection workflows.
• Hollow-fiber membrane core: Precision-engineered asymmetric polyimide membranes with 40 nm separation layer ensure consistent N₂ purity >98% and dew point ≤−40 °C.
• Modular flow scalability: Three standard models—N2-Whisper 0-40 (40 L/min), 0-80 (80 L/min), and 0-120 (120 L/min)—support single- or multi-instrument deployment without flow balancing valves.
• Compact footprint: Vertical 1150 mm × 48 mm × 260 mm form factor enables benchtop placement or wall-mount installation, minimizing lab space requirements.
• Regulated output pressure: Adjustable nitrogen outlet pressure from 8.5 to 10 bar with <0.8 bar pressure drop across full flow range—ensuring compatibility with high-backpressure LC/MS interfaces and pneumatic actuators.
• Ultra-clean delivery: Integrated particulate filtration retains particles <0.01 µm; no post-membrane catalytic scrubbers or additional purification stages required for routine LC/MS-grade applications.

Sample Compatibility & Compliance

The N2-Whisper series is validated for use with nitrogen-dependent analytical platforms requiring Grade 4.0–4.5 (99.99–99.995%) equivalent purity under steady-state conditions. While not rated for ultra-high-purity (98% N₂ output meets ASTM D6349–22 specifications for carrier and auxiliary gases in liquid chromatography and mass spectrometry. The system complies with CE (2014/30/EU EMC Directive, 2014/35/EU LVD), FCC Part 15 Subpart B (Class B), and CSA C22.2 No. 61010-1:12 safety standards. Factory-provided Installation Qualification (IQ) and Operational Qualification (OQ) protocols support GLP, GMP, and ISO/IEC 17025 laboratory accreditation requirements—including traceable calibration records, leak integrity testing, and dew point verification reports.

Software & Data Management

The N2-Whisper is a fully analog, non-digital system—intentionally omitting microprocessors, displays, or firmware to eliminate software validation burdens and cyber-security risks. All operational parameters are mechanically regulated and physically verifiable: outlet pressure is monitored via calibrated Bourdon-tube gauges; flow is confirmed using certified rotameters or thermal mass flow meters installed downstream per user specification. This architecture ensures full compliance with FDA 21 CFR Part 11 for environments where electronic audit trails are either unnecessary or actively discouraged—for example, in QC labs operating under Annex 11 exemptions for “non-critical” utility systems. Optional third-party flow/pressure data loggers (e.g., Omega OM-DAQPRO-5300) may be integrated externally for periodic trending without altering the generator’s qualified state.

Applications

• LC/MS carrier and nebulizer gas supply—replacing high-pressure nitrogen cylinders and eliminating dew-point excursions during extended runs.
• Nitrogen blow-down concentration systems requiring sustained ≥40 L/min flow at 8–10 bar for rapid solvent evaporation across multi-well plates.
• Inert blanketing of reagent storage vessels, synthesis reactors, and sample preparation hoods where O₂ levels <2% are sufficient.
• GC detector make-up gas (FID, NPD) and column purging where ultra-low hydrocarbon content is not mandated.
• Supporting hybrid WHISPER HYBRID configurations that co-deliver instrument-grade nitrogen and oil-free compressed air—enabling dual-gas LC/MS platforms without cross-contamination risk.

FAQ

Does the N2-Whisper require an external air compressor?
Yes. It must be supplied with clean, dry, oil-free compressed air meeting ISO 8573-1 Class 2:2:2. ChemTron does not supply compressors, but provides detailed interface specifications for seamless integration.

Can it be used for FTIR or XRD purge applications?
No. Its >98% N₂ purity and residual O₂/H₂O levels do not meet the sub-ppm purity thresholds required for spectroscopic purge gas; it is optimized for chromatographic and sample prep use cases.

Is the system suitable for 24/7 continuous operation?
Yes. With no electrical components or consumables beyond the membrane module (rated for ≥20,000 hours), the N2-Whisper supports unattended, maintenance-free operation under specified inlet air conditions.

What certifications are included with shipment?
CE, FCC, and CSA declarations of conformity are provided with each unit. Factory-executed IQ/OQ documentation—including pressure decay test reports, dew point validation logs, and particulate filter certification—is available upon order confirmation.

How is nitrogen purity verified during qualification?
Purity is confirmed using calibrated electrochemical O₂ analyzers (e.g., Michell XENTA 400) and chilled-mirror hygrometers (e.g., Vaisala DM70), per ASTM D6349 Annex A2 methodology, with results traceable to NIST standards.