Jiedao SGN-300 High-Purity Nitrogen Generator

Overview

The Jiedao SGN-300 High-Purity Nitrogen Generator is an on-demand, membrane-assisted electrochemical nitrogen generation system engineered for continuous, reliable supply of ultra-high-purity nitrogen gas in analytical laboratories. Unlike traditional pressure-swing adsorption (PSA) or hollow-fiber membrane systems, the SGN-300 employs a dual-stage purification architecture combining selective electrochemical oxygen removal with high-efficiency physical adsorption—enabling stable output of nitrogen with purity ≥99.999% (≤1 ppm O₂ + moisture). Designed for integration with GC, LC-MS, FTIR, and elemental analyzers requiring inert carrier or purge gas, the unit operates without consumables or external air compressors, delivering consistent flow across variable demand conditions. Its compact footprint (390 × 185 × 320 mm) and low thermal load (150 W) make it suitable for benchtop deployment in regulated environments where space, safety, and operational continuity are critical.

Key Features

• Stainless steel electrolytic cell with noble-metal catalytic electrodes ensures long-term stability and resistance to corrosion under continuous operation.
• Integrated pressure regulation and real-time digital flow display (0–300 mL/min) enable precise monitoring and rapid fault diagnostics.
• Factory-calibrated output pressure of 0.4 MPa (60 psi), adjustable within 0–0.4 MPa range to match instrument inlet requirements—including GC carrier gas lines and mass spectrometer collision gas ports.
• No high-pressure cylinders required: eliminates hazards associated with cylinder handling, storage, and regulatory compliance for compressed gas inventory.
• Automatic start-up, shutdown, and pressure-hold functions support unattended overnight operation and seamless integration into automated lab workflows.
• Low-maintenance design: no replaceable filters or desiccants during normal operation; periodic electrode inspection recommended per 12,000 hours of cumulative runtime.

Sample Compatibility & Compliance

The SGN-300 delivers nitrogen meeting ISO 8573-1 Class 1.2.1 (compressed air quality) and ASTM D6349-20 specifications for trace-gas-free carrier gas in chromatographic applications. Its ≤−40 °C dew point satisfies moisture-sensitive instrumentation including FTIR sample compartments and residual gas analyzers. The unit complies with IEC 61010-1:2010 for electrical safety in laboratory equipment and supports GLP/GMP-aligned documentation through optional audit-ready log export (via RS-232 interface). While not certified to FDA 21 CFR Part 11 out-of-the-box, its deterministic control logic and non-volatile event logging provide foundational traceability for regulated QC labs performing method validation per USP and ISO/IEC 17025:2017.

Software & Data Management

The SGN-300 features embedded firmware with configurable alarm thresholds (low-flow, over-pressure, temperature excursion) and non-volatile internal memory storing up to 30 days of operational logs—including timestamped flow rate, pressure, and system status events. Data export is supported via standard RS-232 serial protocol compatible with LabVIEW, MATLAB, and custom SCADA platforms. Optional PC-based utility software enables remote parameter adjustment, trend visualization, and CSV-formatted report generation for preventive maintenance scheduling and ISO 13485-compliant record retention.

Applications

• Gas chromatography (GC) carrier and detector make-up gas, particularly for TCD, FID, and ECD detectors requiring sub-ppm oxygen and moisture control.
• LC-MS and GC-MS source and collision cell purge gas, minimizing background adduct formation and improving signal-to-noise ratio.
• Inert atmosphere generation for glove boxes, sample preparation stations, and thermal analysis (TGA/DSC) purge lines.
• Blank gas supply for elemental analyzers (CHNS/O), FTIR spectroscopy, and laser calibration systems demanding stable, particle-free nitrogen.
• Replacement of liquid nitrogen dewars in cryogenic trapping applications where continuous low-flow (<100 mL/min) is sufficient.

FAQ

What is the expected service life of the electrolytic cell?
Under continuous operation at rated flow and ambient conditions (25 °C, <60% RH), the cell maintains ≥99.999% purity for ≥12,000 operating hours before performance verification is recommended.
Does the SGN-300 require external compressed air or an air dryer?
No—unlike PSA-based generators, the SGN-300 draws ambient air directly and integrates internal drying and filtration; no external air preparation is necessary.
Can output pressure be adjusted for compatibility with older GC instruments?
Yes—the pressure regulator is field-adjustable from 0 to 0.4 MPa in 0.01 MPa increments using the front-panel control knob.
Is the nitrogen output suitable for use in FDA-regulated pharmaceutical testing?
The gas meets USP and EP 2.5.27 purity criteria for instrumental analysis; final suitability must be confirmed via in-house verification per your laboratory’s SOPs and risk assessment.
What maintenance intervals are recommended?
Visual inspection every 6 months; electrode cleaning with deionized water every 2,000 hours; full system calibration annually or after any major environmental shift (e.g., relocation, humidity exposure).