Tisch ZA-747-30 Zero Air Generator
| Brand | Tisch |
|---|---|
| Origin | USA |
| Manufacturer Status | Authorized Distributor |
| Origin Category | Imported |
| Model | ZA-747-30 |
| Zero Air Purity | <1 ppb total hydrocarbons (as methane) |
| Zero Air Flow Rate | 30 L/min |
| Output Pressure | 90 psi |
| Dew Point | −50 °C |
| Flow Measurement Accuracy | ±2 L/min |
Overview
The Tisch ZA-747-30 Zero Air Generator is an engineered solution for laboratories and monitoring facilities requiring continuous, ultra-high-purity zero air compliant with stringent analytical standards. It operates via catalytic oxidation—using a high-efficiency, temperature-controlled platinum-based catalyst—to oxidize ambient hydrocarbons (including methane, ethane, propane, and volatile organic compounds) in compressed air to carbon dioxide and water vapor, which are subsequently removed by integrated desiccant and cold trap stages. The resulting zero air meets EPA Method TO-14/TO-15, ASTM D6196, and ISO 8573-1 Class 1:2:1 specifications for hydrocarbon-free calibration gas. Designed for integration into trace-level gas analysis workflows—including GC-FID, GC-MS, ambient air monitoring systems, and photometric ozone calibrators—the ZA-747-30 eliminates reliance on high-pressure cylinder delivery, mitigating supply chain risk, logistical overhead, and batch-to-batch variability inherent in bottled zero air.
Key Features
- Ultra-low hydrocarbon output: <1 ppb total hydrocarbons (reported as methane equivalent), validated per EPA Protocol 1 and certified via flame ionization detection (FID) traceability
- Stable, adjustable flow output: 30 L/min at 90 psi, regulated via precision mass flow controller with real-time digital feedback
- Dual-stage purification architecture: Catalytic oxidation module followed by cryogenic condensation (−50 °C dew point) and dual-bed desiccant drying
- Thermally managed enclosure: Integrated forced-air cooling and thermal insulation ensure safe surface temperatures (<45 °C) and stable catalyst operating conditions (350–420 °C)
- Flexible mounting: Rack-mount (19″ EIA standard) or benchtop configuration supported; includes vibration-dampened feet and universal mounting brackets
- User-accessible service design: Front-panel hinged access door enables rapid catalyst cartridge replacement and desiccant regeneration without tools
- Intuitive operator interface: Backlit LCD display showing real-time flow, pressure, catalyst temperature, and system status codes
Sample Compatibility & Compliance
The ZA-747-30 accepts clean, oil-free, dried compressed air feed gas (ISO 8573-1 Class 1:2:1 or better; dew point ≤ −40 °C) at inlet pressures of 100–120 psi. It is compatible with all major gas chromatography detectors (FID, PID, ECD), ozone photometers (UV absorption at 254 nm), and continuous emission monitoring systems (CEMS). The unit complies with UL 61010-1 (safety), IEC 61326-1 (EMC), and supports GLP/GMP documentation requirements through optional audit-trail-enabled firmware (21 CFR Part 11-ready when paired with Tisch’s LogView Pro software). Calibration certificates traceable to NIST SRM 1648a (urban particulate matter) and NIST SP 2100-12 (hydrocarbon reference standards) are available upon request.
Software & Data Management
While the ZA-747-30 operates autonomously via its embedded microcontroller, optional connectivity modules enable RS-232 or Ethernet communication for remote monitoring and logging. When integrated with Tisch LogView Pro (v3.2+), users gain access to time-stamped operational logs—including catalyst temperature history, flow deviation alerts, and maintenance countdown timers—exportable in CSV or PDF for internal QA review. System event logs meet FDA 21 CFR Part 11 requirements for electronic records when deployed with user authentication, digital signatures, and immutable audit trails. No cloud dependency: all data resides locally unless explicitly configured for secure enterprise network transfer.
Applications
- Calibration of ambient air analyzers (O₃, NOₓ, SO₂, CO) per U.S. EPA 40 CFR Part 53 and EN 14625
- Carrier and fuel gas supply for GC-FID and GC-PID systems in environmental, petrochemical, and pharmaceutical QC labs
- Zero-gas generation for FTIR and cavity ring-down spectroscopy (CRDS) platforms requiring sub-ppb baseline stability
- Reference gas production in automotive exhaust testing (e.g., chassis dynamometer certification per SAE J1669)
- Supporting ASTM D5504 (sulfur compounds), ASTM D6420 (VOCs), and ISO 16000-6 (indoor air) compliance protocols
- On-site zero air for mobile monitoring units and unmanned air quality stations
FAQ
What feed gas specifications are required for optimal performance?
Clean, oil-free, and desiccated compressed air with a dew point ≤ −40 °C and particulate filtration ≤ 0.01 µm is mandatory. Oil-lubricated compressors are strictly prohibited.
How often must the catalyst cartridge be replaced?
Under typical operation (30 L/min, 8 hrs/day), the platinum catalyst retains efficacy for ≥18 months; replacement intervals are tracked automatically and displayed on the front panel.
Can the ZA-747-30 be integrated into an existing lab gas distribution network?
Yes—standard ¼″ NPT stainless steel inlet/outlet ports support direct manifold connection; pressure regulation and particulate filtration upstream are recommended.
Does the unit require external cooling water or chilled air?
No—integrated thermoelectric coolers and forced-air heat exchangers provide all necessary thermal management.
Is validation documentation provided with shipment?
Each unit ships with a Factory Acceptance Test (FAT) report, including hydrocarbon purity verification at 30 L/min using NIST-traceable FID, plus electrical safety and pressure integrity test records.
