Alytech GMRACK Multi-Channel Dynamic Gas Dilution System
| Brand | Alytech |
|---|---|
| Origin | France |
| Model | GMRACK |
| Channel Configuration | 2–6 configurable channels |
| Control Interface | Optional integrated touchscreen or external PC control |
| Power Supply | Line-powered (with optional battery for field mobility) |
| Compliance | Designed for ISO/IEC 17025-compliant calibration laboratories and EPA Method TO-14/TO-15 traceable gas standard generation |
Overview
The Alytech GMRACK is a precision-engineered multi-channel dynamic gas dilution system designed for the accurate, reproducible, and traceable generation of low-concentration calibration standards in environmental monitoring, ambient air quality analysis, and laboratory-based gas chromatography–mass spectrometry (GC-MS) method validation. Operating on the principle of continuous mass-flow-controlled dilution—where certified primary standard gases or permeation tube effluents are dynamically mixed with purified zero air—the GMRACK delivers stable, time-synchronized output streams across 2 to 6 independently programmable channels. Its architecture eliminates reliance on high-pressure cylinder banks, reducing logistical complexity and enabling long-term unattended operation in fixed-site calibration labs or mobile monitoring units. The system meets the physical and metrological requirements for generating reference materials at sub-ppb to low-ppm levels, supporting regulatory compliance under EPA Methods TO-14A, TO-15, and ASTM D6420, as well as ISO 16000-6 and EN 13649-1 for VOC and inorganic gas standard preparation.
Key Features
- Modular channel scalability: Configurable for 2, 4, or 6 independent dilution paths—each with dedicated thermal mass flow controllers (MFCs), pressure regulation, and real-time flow monitoring.
- Zero-air generation integrated: Built-in oil-free diaphragm pump (5 L/min capacity) coupled with dual-stage filtration (particulate + hydrocarbon scrubber) and catalytic CO/NOx removal ensures <1 ppb hydrocarbon background and <0.1 ppm CO/NOx in diluent stream.
- Traceable flow control: Each MFC calibrated to NIST-traceable standards; full-scale accuracy ±1.0% of reading, repeatability <0.5% RSD over 24 h.
- Flexible control architecture: Supports standalone operation via optional industrial-grade capacitive touchscreen (IP65-rated) or remote configuration and logging via Ethernet/USB using Alytech’s GasMixX™ Control Suite (Windows-compatible).
- Robust mechanical design: Aluminum chassis with vibration-damped mounting; operating temperature range 15–35°C, relative humidity ≤80% non-condensing; CE, RoHS, and EMC compliant.
- Field-deployable readiness: Optional hot-swappable Li-ion battery pack enables up to 8 hours of continuous operation without mains power—validated per IEC 62368-1 for portable instrumentation safety.
Sample Compatibility & Compliance
The GMRACK accommodates a broad spectrum of source gases including certified compressed standards (e.g., CH4, CO, NO, SO2, O3, BTEX), permeation tubes (e.g., formaldehyde, H2S, Cl2), and diffusion sources. It supports both positive-pressure and vacuum-driven input configurations. All wetted materials comply with ASTM F2253 for elastomer compatibility with reactive gases. The system is validated for use in GLP environments, with audit-ready electronic records, user-access controls, and configurable data retention policies aligned with FDA 21 CFR Part 11 requirements when operated with the optional software license. Calibration certificates for MFCs and pressure transducers are provided with NIST-traceable uncertainty statements.
Software & Data Management
GasMixX™ Control Suite provides comprehensive instrument supervision, including real-time channel status dashboards, automated dilution ratio calculation (based on source concentration, target level, and flow setpoints), and scheduled sequence execution (e.g., multi-level calibration curves). Raw sensor data—including mass flow, temperature, pressure, and valve state—is timestamped at 10 Hz and exported in CSV or HDF5 format. Audit trails log all parameter changes, user logins, and system events with SHA-256 hashing. Optional integration with LIMS platforms via OPC UA or RESTful API enables direct ingestion into enterprise QA/QC workflows.
Applications
- Calibration of ambient air analyzers (e.g., UV photometric O3, chemiluminescent NOx, FTIR multi-gas systems)
- Method validation and ongoing precision testing per ISO/IEC 17025 Clause 7.7
- Dynamic spiking of canisters and Tedlar bags for GC-MS/VOC analysis
- Generation of challenge gases for sensor drift assessment and response time verification
- Supporting reference material production in national metrology institutes (NMIs) and accredited calibration labs
FAQ
What is the maximum number of simultaneously active dilution channels?
Up to six channels can be operational concurrently, each with independent flow and concentration programming.
Does the GMRACK require external zero-air supply?
No—integrated zero-air generation eliminates dependency on external cylinders or house air lines, provided ambient intake air meets ISO 8573-1 Class 2 particulate and Class 1 oil specifications.
Can the system be used with permeation tubes?
Yes—when paired with Alytech’s PerMix ATMO module (sold separately), the GMRACK accepts two temperature-stabilized permeation sources (40–70°C, ±0.1°C stability) for ultra-low-concentration VOC and toxic gas standards.
Is remote diagnostics supported?
Yes—via embedded web server and secure TLS-enabled remote access; firmware updates and configuration backups can be performed over encrypted connections.
What documentation is included for regulatory audits?
Factory calibration reports, electrical safety test certificates, EMC test summaries, and a full traceability matrix linking hardware IDs to NIST-traceable calibrations are supplied in digital and printed formats.
