Junray ZR-A05 Eight-Stage Andersen Air Sampler

Overview

The Junray ZR-A05 Eight-Stage Andersen Air Sampler is a precision-engineered, cascade inertial impactor designed for quantitative assessment of viable airborne microorganisms—including aerobic bacteria and fungi—in environmental, occupational health, pharmaceutical cleanroom, and clinical settings. Based on the well-established Andersen principle of size-selective particle separation, the device operates by accelerating an aerosol-laden air stream through a series of progressively smaller orifices across eight stacked stainless-steel stages. At each stage, particles with aerodynamic diameters exceeding the cutoff threshold for that level are inertially deposited onto nutrient agar surfaces in standard 90 mm Petri dishes. This enables simultaneous collection and size-resolved enumeration of culturable bioaerosols—mimicking regional deposition patterns observed in human respiratory tracts (nasopharyngeal, tracheobronchial, and alveolar regions) per ISO 14698-1 and ACGIH TLV® guidelines.

Key Features

• Eight-stage cascade impactor architecture calibrated to replicate anatomically relevant particle deposition efficiencies, supporting compliance with ISO 14698-1:2003 and GB/T 18204.1–2013
• Corrosion-resistant aluminum alloy construction ensures long-term dimensional stability and resistance to disinfectants and humid environments
• Standardized orifice geometry and flow dynamics validated at 28.3 L/min nominal sampling rate (adjustable within ±5% via calibrated rotameter)
• Interchangeable stainless-steel stages with precision-machined nozzles; each stage accommodates one standard 90 mm Petri dish
• No internal moving parts or electronic components—mechanical reliability optimized for field deployment and GLP-compliant laboratory use
• Modular design facilitates rapid disassembly, cleaning, sterilization (autoclavable up to 121°C), and stage-specific calibration verification

Sample Compatibility & Compliance

The ZR-A05 is compatible with all conventional microbiological growth media, including Tryptic Soy Agar (TSA), Sabouraud Dextrose Agar (SDA), and malt extract agar—enabling differentiation between bacterial and fungal colonies post-incubation. Its performance aligns with internationally recognized bioaerosol sampling protocols, including those referenced in USP , EU GMP Annex 1 (2022), and ISO 14644-1:2015 for cleanroom environmental monitoring. While not intrinsically compliant with FDA 21 CFR Part 11 (as it generates analog colony data requiring manual transcription), its output supports ALCOA+ data integrity principles when integrated into validated laboratory workflows with audit-trail documentation.

Software & Data Management

As a purely mechanical sampling instrument, the ZR-A05 does not incorporate embedded firmware, digital interfaces, or proprietary software. All operational parameters—including flow rate, sampling duration, and environmental conditions (temperature, relative humidity)—must be recorded manually or via external logging devices. Colony enumeration follows standardized microbiological counting procedures (e.g., ISO 4833-1:2013), and data may be entered into LIMS platforms or validated spreadsheets. Laboratories implementing this instrument in regulated environments are advised to maintain full traceability of calibration certificates, maintenance logs, and operator training records per GLP and GMP requirements.

Applications

• Environmental monitoring of hospital wards, isolation rooms, and operating theatres
• Pharmaceutical facility qualification (cleanrooms, isolators, RABS) per EU GMP Annex 1
• Industrial hygiene assessments in food processing, biotechnology, and agricultural facilities
• Research on bioaerosol dispersion dynamics, filtration efficiency testing, and HVAC system validation
• Epidemiological studies linking airborne microbial load to respiratory health outcomes
• Validation of disinfection protocols (e.g., hydrogen peroxide vapor, UV-C) through pre- and post-treatment bioaerosol profiling

FAQ

What is the recommended sampling flow rate for the ZR-A05?
The nominal volumetric flow rate is 28.3 L/min, calibrated using a primary standard flowmeter traceable to NIM (National Institute of Metrology, China). Deviations beyond ±5% require recalibration.
Can the ZR-A05 be used for non-viable particle analysis?
No. The ZR-A05 is designed exclusively for culturable (viable) microorganisms. Non-viable particle sizing requires optical particle counters (OPCs) or laser diffraction systems.
Is the unit suitable for outdoor ambient air sampling?
Yes—with appropriate weather protection (e.g., wind shield, rain hood) and flow stabilization. Extended sampling durations (>10 min) are recommended to achieve statistically robust colony counts in low-concentration environments.
How often should the impactor stages be cleaned and sterilized?
Stages must be cleaned with isopropyl alcohol and autoclaved (121°C, 15 psi, 20 min) before each use in sterile applications. Routine inspection for nozzle wear or residue accumulation is required after every 50 sampling cycles.
Does Junray provide calibration services or certified reference materials?
Junray offers factory calibration verification reports upon request. Users are responsible for maintaining third-party accredited calibration of flow meters and incubators per ISO/IEC 17025 requirements.