Zero Air Generator ZA2000T by CMC (Himsi)

Overview

The CMC (Himsi) ZA2000T Zero Air Generator is an engineered solution for laboratories requiring ultra-pure, hydrocarbon-free air as a combustion support gas in gas chromatography with flame ionization detection (GC-FID). Unlike compressed gas cylinders—subject to logistical constraints, safety hazards, and declining purity over time—the ZA2000T produces zero air continuously from ambient compressed air via a multi-stage purification process grounded in catalytic oxidation and precision adsorption. It delivers stable, certified-grade zero air (<0.05 ppm CH₄) at a constant flow rate of 2000 mL/min and outlet pressure adjustable between 2–10 bar, meeting the stringent baseline stability and detector response criteria essential for quantitative trace hydrocarbon analysis. Its compact footprint (270 × 340 × 460 mm), silent operation, and plug-and-play integration eliminate infrastructure modifications—making it suitable for benchtop deployment in QC labs, environmental testing facilities, and pharmaceutical R&D environments where regulatory audit readiness and operational continuity are critical.

Key Features

• Continuous on-demand zero air generation without reliance on high-pressure cylinders or external gas supply networks
• Catalytic oxidation + dual-stage molecular sieve filtration system ensuring consistent CH₄ removal to <0.05 ppm (detection limit verified per ISO 8573-5)
• Real-time monitoring of inlet air quality (HC concentration), flow rate, pressure, temperature, and system status via embedded microcontroller
• Fail-safe relay alarm output triggered upon deviation from preset thresholds (e.g., elevated inlet HC, pressure drop, thermal overload)
• Optional automatic switchover module enabling seamless transition to backup cylinder supply during fault conditions—supporting uninterrupted GC operation
• Low standby power draw (<30 W/h) and efficient startup profile (full specification output achieved within 10 minutes)
• Robust industrial-grade housing with IP20-rated enclosure; CE-marked and compliant with EN 61000-6-2/6-4 electromagnetic compatibility standards

Sample Compatibility & Compliance

The ZA2000T is validated for use with all major GC-FID platforms, including Agilent, Thermo Fisher, Shimadzu, and PerkinElmer systems requiring zero air with ≤0.05 ppm total hydrocarbons (as methane equivalent). It satisfies the gas purity specifications outlined in ASTM D6216 (Standard Practice for Generation of Zero Air for Ambient Air Monitoring), ISO 8573-1:2010 Class 1 for particulate, water, and oil content, and USP “Gas Chromatography” for pharmaceutical method validation. The unit supports GLP/GMP-aligned workflows through configurable event logging (when paired with optional digital interface modules) and provides traceable performance documentation for FDA 21 CFR Part 11–compatible data management systems.

Software & Data Management

While the base ZA2000T operates without a display or onboard software interface, its analog/digital I/O ports (0–10 V, 4–20 mA, dry contact relay) enable integration into centralized laboratory infrastructure via PLCs, SCADA systems, or LIMS. Optional RS-485 Modbus RTU communication allows remote parameter readout—including real-time flow, inlet/outlet pressure, catalyst temperature, and alarm status—for inclusion in electronic lab notebooks (ELNs) or automated calibration records. Audit trails generated through external controllers comply with data integrity principles under ALCOA+ (Attributable, Legible, Contemporaneous, Original, Accurate) frameworks.

Applications

• GC-FID carrier and detector gas supply in environmental air monitoring (EPA Method 25A, TO-14A, TO-15)
• Calibration gas dilution systems requiring inert, hydrocarbon-free sweep gas
• Trace VOC analysis in food packaging, polymer off-gassing, and indoor air quality studies
• Reference standard preparation for EPA-certified laboratories performing compliance testing
• Support gas for FTIR and chemiluminescence NO_x analyzers requiring low-background air

FAQ

What is the maximum allowable inlet hydrocarbon concentration for reliable operation?
The ZA2000T accepts inlet air with up to 100 ppm CH₄ equivalent; exceeding this threshold may reduce catalyst service life and compromise outlet purity.
Does the unit require periodic maintenance or consumable replacement?
Yes—the integrated coalescing filter and activated carbon pre-filter should be replaced every 6–12 months depending on inlet air quality; the catalytic converter has a typical service life of 2–3 years under continuous operation.
Can the ZA2000T be integrated into a facility-wide gas distribution network?
Yes, provided the central compressed air supply meets ISO 8573-1 Class 2 (≤0.1 µm particles, ≤−40 °C dew point, ≤0.1 mg/m³ oil aerosol) and is free of compressor lubricant carryover.
Is the output pressure adjustable?
Yes—output pressure is factory-set to 5 bar but can be reconfigured within the 2–10 bar range using the internal pressure regulator; adjustment requires calibrated instrumentation and is recommended only by authorized service personnel.
How does the automatic switchover option function during a fault condition?
Upon detection of a critical fault (e.g., catalyst overheating, flow loss), the unit de-energizes its main solenoid valve and simultaneously closes the primary air path while opening the auxiliary cylinder line via a fail-safe 3-way pneumatic valve—ensuring zero interruption to connected instruments.