GOW-MAC 1300 Helium-Based Trace Nitrogen Analyzer
| Brand | GOW-MAC |
|---|---|
| Origin | USA |
| Model | GOW-MAC 1300 |
| Instrument Type | Laboratory Gas Chromatograph |
| Temperature Control Range | 0–450 °C |
| Ramp Rate | 0.1–40 °C/min |
| Cooling Rate | 450 °C to 10 °C in ~5 min |
| Carrier Gas Flow Range & Control | 0–30 mL/min |
| Carrier Gas Pressure Range & Control | 0–100 kPa |
| Injector Max Operating Temperature | 450 °C |
| Injector Pressure Setpoint Range | 0–100 kPa |
| Injector Total Flow Setpoint Range | 0–30 mL/min |
| Detection Limit | 10 ppb (N₂ in He) |
| Detection Principle | Helium Plasma Emission Spectroscopy |
| Output Signal | 4–20 mA analog + dry contact alarms |
| Configuration Options | 0–2/0–20 ppm or 0–20/0–200 ppm dual-range modes |
| Power Options | 115 V AC or 230 V AC |
Overview
The GOW-MAC 1300 Helium-Based Trace Nitrogen Analyzer is a dedicated, non-chromatographic gas analyzer engineered for ultra-trace nitrogen quantification in high-purity helium matrices. Unlike conventional gas chromatographs that rely on separation columns and thermal conductivity or flame ionization detection, the 1300 employs helium plasma emission spectroscopy — a physical optical detection method wherein nitrogen atoms excited in a stabilized helium plasma emit characteristic ultraviolet radiation at 149.3 nm. This principle eliminates dependence on consumable columns, carrier gases, valves, or radioactive sources, delivering inherent long-term stability and zero drift over extended operation. Designed for continuous, unattended monitoring in critical gas purity assurance workflows, the instrument achieves a verified detection limit of 10 ppb N₂ in He with sub-second response time and full-scale recovery within <60 seconds. Its robust architecture supports integration into GLP-compliant laboratories, semiconductor fab gas delivery systems, and ISO 8573-1 Class 1 compressed gas certification protocols.
Key Features
- Helium plasma emission spectroscopy detection — no column, no carrier gas, no radioactive source, no consumables
- 10 ppb detection limit for nitrogen in helium with NIST-traceable calibration capability
- Dual-range configurable measurement: 0–2 / 0–20 ppm or 0–20 / 0–200 ppm, switchable via front-panel interface
- 4–20 mA analog output with isolated dry-contact relays for out-of-range alarm and range selection status
- Zero-maintenance design: no sensor replacement, no periodic detector cleaning, no flow-path consumables
- Compact benchtop form factor with integrated sample conditioning and pressure regulation
- Operating temperature range: 0–450 °C for injector and detector zones; optimized for ambient to elevated process line temperatures
Sample Compatibility & Compliance
The GOW-MAC 1300 is validated for direct analysis of helium streams containing ≤100 ppm total impurities, with no interference from oxygen, hydrogen, argon, methane, or water vapor under typical industrial conditions. It complies with ASTM D8194–21 (Standard Practice for Determination of Trace Nitrogen in High-Purity Helium by Optical Emission Spectrometry) and supports adherence to ISO 8573-1:2010 Class 1 (≤0.1 mg/m³ oil-free, ≤0.1 ppm N₂) for helium used in semiconductor lithography and cryogenic applications. The analyzer meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and safety (EN 61010-1), and its analog/digital I/O architecture supports integration into SIL-2-rated process safety systems per IEC 61511.
Software & Data Management
While the 1300 operates as a stand-alone analyzer with local display and push-button configuration, it supports optional RS-485 Modbus RTU communication for integration into SCADA, DCS, or LIMS environments. All calibration events, range switches, alarm triggers, and diagnostic logs are timestamped and stored internally for ≥30 days. Audit trail functionality satisfies FDA 21 CFR Part 11 requirements when paired with compliant host software — including electronic signature capture, user access levels (admin/operator), and immutable log export via USB-C. No proprietary drivers or cloud dependencies are required; configuration and diagnostics are accessible via standard terminal emulation.
Applications
- Verification of helium purity prior to filling cryogenic transport trailers and ISO containers
- In-line monitoring of bulk helium supply lines in semiconductor fabrication facilities (e.g., EUV lithography tool gas cabinets)
- Quality gate testing for specialty gas cylinders certified to CGA G-13 or SEMI F57 standards
- Process validation during commissioning of new helium purification skids or PSA/N₂-removal units
- Welding gas certification labs performing ASTM D1946-compliant trace impurity profiling
- Research laboratories requiring stable, low-drift baseline for kinetic studies of nitrogen diffusion in metallic lattices at cryogenic temperatures
FAQ
Does the GOW-MAC 1300 require carrier gas or column maintenance?
No — it uses helium plasma emission spectroscopy and contains no chromatographic column, carrier gas system, or mechanical valves.
Can the instrument be calibrated using certified standard gas mixtures?
Yes — NIST-traceable helium/nitrogen standards (e.g., 1 ppm N₂ in He, ±2% uncertainty) are recommended for initial calibration and periodic verification.
Is the 1300 suitable for installation in hazardous areas?
The base model is rated for Class I, Division 2 (NEC) / Zone 2 (IECEx) environments; ATEX-certified variants (1300-ATEX) are available upon request.
What is the warm-up time required before stable operation?
Less than 15 minutes from cold start to full specification performance, including plasma stabilization and thermal equilibrium.
How is data integrity ensured during power interruption?
Internal non-volatile memory retains calibration coefficients, event logs, and configuration parameters across power cycles without battery backup.
