Tisch ZA-737-100 Zero Air Generator

Overview

The Tisch ZA-737-100 Zero Air Generator is a high-performance, laboratory-grade instrument engineered to produce ultra-pure zero air for critical environmental monitoring, analytical calibration, and reference gas applications. Utilizing a multi-stage purification architecture—including catalytic oxidation, molecular sieve adsorption, activated carbon filtration, and optional ozone scrubbing—the ZA-737-100 removes trace contaminants (e.g., hydrocarbons, NO_x, SO₂, CO, O₃, H₂S, NH₃, COS, SF₆, and fluorocarbons) to sub-part-per-trillion levels, delivering certified zero air compliant with EPA Method TO-14/TO-15, ASTM D6196, ISO 8573-1 Class 0 (for gaseous contaminants), and US EPA 40 CFR Part 53 requirements for ambient air quality monitor calibration. Designed for continuous, unattended operation in fixed-site laboratories and mobile monitoring platforms, the ZA-737-100 eliminates dependency on compressed cylinder gas—reducing logistical overhead, contamination risk, and long-term operational cost—while ensuring metrological traceability and measurement stability across regulatory-grade analyzers including GC-FID, GC-ECD, chemiluminescence NO_x analyzers, UV photometric O₃ analyzers, and TEOM particulate monitors.

Key Features

• Ultra-low contaminant output: ≤0.5 ppb for SO₂, NO, NO₂, NH₃, H₂S; ≤1 ppb for O₃, CO, total hydrocarbons (as methane); ≤0.5 ppb for COS; non-detectable for SF₆ and fluorocarbons under standard operating conditions
• Stable, adjustable flow delivery: 0–100 L/min at 80 psi (5.5 bar), with integrated precision needle valve and digital flow indication (±1 L/min accuracy)
• Dew point control to –50 °C (–58 °F) via refrigerated dryer and desiccant polishing, ensuring compatibility with cold-trap GC systems and humidity-sensitive optical sensors
• Robust dual-voltage power supply: 115 V, 60 Hz (15 A circuit) or 220–240 V, 50/60 Hz, supporting global deployment without external transformers
• Modular cabinet design: Benchtop or rack-mount configuration available; front-panel pressure gauges (inlet/outlet), LED flow display, and service-accessible filter cartridges simplify maintenance and validation
• Compliance-ready construction: CE-marked; meets IEC 61000-6-2/6-3 EMC standards; designed for integration into GLP/GMP and ISO/IEC 17025-accredited laboratory environments

Sample Compatibility & Compliance

The ZA-737-100 generates zero air suitable for direct use with federal reference method (FRM) and federal equivalent method (FEM) analyzers deployed by U.S. EPA Regional Laboratories, State Implementation Plans (SIPs), and international air quality networks (e.g., EMEP, GAW). Its output meets or exceeds purity specifications defined in EPA 40 CFR Part 53 Appendix A (for NO_x and O₃ analyzer calibration), ISO 14644-1 Class 5 cleanroom air requirements for gaseous impurities, and ASTM D6196 Annex A1 for VOC background gas qualification. All purification media are replaceable per manufacturer-specified intervals (typically 6–12 months depending on inlet air quality), with documented lot traceability and post-replacement verification protocols supporting audit readiness under FDA 21 CFR Part 11 and ISO/IEC 17025 Clause 6.6.

Software & Data Management

While the ZA-737-100 operates as a standalone hardware system without embedded firmware or network connectivity, it is fully compatible with third-party data acquisition and laboratory information management systems (LIMS) via analog 4–20 mA or 0–10 VDC outputs (optional) for real-time flow and pressure telemetry. Comprehensive user documentation includes SOP templates for IQ/OQ/PQ validation, preventive maintenance logs, and calibration certificate generation aligned with ISO/IEC 17025 Section 7.7. Optional factory-installed flow meters with NIST-traceable calibration certificates support metrological assurance for auditable workflows.

Applications

• Calibration of ambient air pollutant analyzers (NO/NO₂/NO_x, O₃, SO₂, CO, VOCs) per U.S. EPA Performance Evaluation Protocols
• Zero-gas supply for cavity ring-down spectroscopy (CRDS), tunable diode laser absorption spectroscopy (TDLAS), and Fourier-transform infrared (FTIR) gas analyzers
• Carrier and purge gas in thermal desorption–gas chromatography–mass spectrometry (TD-GC-MS) systems for ultra-trace environmental analysis
• Baseline correction and detector conditioning in continuous emission monitoring systems (CEMS) and stack testing instrumentation
• Research-grade zero air for atmospheric chemistry simulation chambers and climate modeling laboratories

FAQ

What inlet air quality is required for optimal ZA-737-100 performance?
The generator requires oil-free, particle-filtered compressed air or ambient air pre-conditioned to ≤0.1 µm particulates, ≤1 ppm oil aerosol, and ≤10 ppm water vapor. An optional Tisch pre-filtration module (Model PF-100) is recommended for non-lab-grade inlet sources.
Can the ZA-737-100 be validated per ISO/IEC 17025 requirements?
Yes—its modular design supports full IQ/OQ/PQ execution using Tisch-provided validation kits, NIST-traceable gas standards, and documented test protocols aligned with ISO/IEC 17025 Clause 6.6 and EURACHEM CG-18 guidelines.
Is remote monitoring or alarm capability available?
Standard units include visual status indicators and mechanical pressure relief; optional analog outputs (4–20 mA) enable integration with building management systems (BMS) or SCADA for remote flow/pressure trending and fault alerts.
How often must consumables be replaced?
Catalyst and adsorbent cartridges require replacement every 6–12 months depending on daily runtime and inlet air quality; Tisch provides serialized replacement kits with expiration tracking and post-installation verification checklists.
Does the ZA-737-100 comply with FDA 21 CFR Part 11 for electronic records?
As a hardware-only gas generation system with no electronic data storage or user-modifiable software, it falls outside the scope of Part 11—but its output gas integrity, maintenance logs, and calibration records are fully auditable within a compliant LIMS or ELN ecosystem.