ZR-A03 Impactor Sampling Head for Airborne Microbial Collection

Overview

The ZR-A03 Impactor Sampling Head is a precision-engineered component designed exclusively for active air microbiological sampling in environmental monitoring, pharmaceutical cleanroom validation, hospital infection control, and food safety laboratories. It operates on the principle of inertial impaction—a well-established physical collection mechanism defined in ISO 14698-1 (Biocontamination control) and referenced in USP and EU GMP Annex 1. When conditioned air is drawn through the sampling head at a calibrated volumetric flow rate, aerosolized microorganisms—carried as viable particles within 0.5–10 µm aerodynamic diameter—maintain sufficient momentum to deviate from the streamlined gas flow upon encountering the abrupt constriction at the jet nozzle. This inertial separation forces particles to impact onto the surface of a liquid medium (e.g., neutralizing buffer, peptone water, or R2A broth) contained in the downstream collection vessel. The high-velocity jet (typically 15–30 m/s at nozzle exit, dependent on flow rate and nozzle geometry) ensures efficient particle deposition while minimizing bounce-off and re-aerosolization—critical for quantitative recovery of bacteria, fungi, and actinomycetes.

Key Features

• Stainless steel and borosilicate glass construction ensures chemical resistance, autoclavability (121°C, 20 min), and compliance with ISO 14698-2 requirements for sampling device validation.
• Fixed-geometry conical nozzle (inner diameter: 0.5 mm) optimized for >90% collection efficiency across the 1–5 µm particle size range per ISO 21501-4 calibration protocols.
• Modular design enables seamless integration with standard vacuum-driven air samplers (e.g., ZR-3000 series, MAS-100, or third-party pumps delivering 28.3 L/min ±5% flow stability).
• No internal moving parts or consumable filters—reducing maintenance overhead and eliminating filter-clogging artifacts common in membrane-based systems.
• Low dead-volume fluid reservoir (5–10 mL nominal capacity) minimizes dilution effects and supports direct plating or molecular analysis (qPCR, NGS) without concentration steps.

Sample Compatibility & Compliance

The ZR-A03 is validated for use with aqueous microbiological media including tryptic soy broth (TSB), buffered peptone water (BPW), and glycine–Tween 80 neutralizing solution for disinfectant residue mitigation. It meets the functional performance criteria outlined in GB/T 18204.1–2013 (Chinese National Standard for Air Microbiological Testing Methods) and aligns with ASTM D6329-98(2020) for impaction-based bioaerosol collection. Device sterility assurance follows ISO 11137-1 for radiation sterilization or ISO 17665-1 for steam sterilization—documentation provided upon request for GLP/GMP audit readiness. All materials comply with USP Class VI biocompatibility testing for indirect patient contact applications.

Software & Data Management

As a passive hardware component, the ZR-A03 does not incorporate embedded electronics or firmware. However, it is fully compatible with laboratory information management systems (LIMS) and electronic lab notebooks (ELN) when used in conjunction with compliant air samplers equipped with flow logging, time-stamped run records, and audit-trail-enabled controllers meeting FDA 21 CFR Part 11 requirements. Calibration certificates—including flow verification reports traceable to NIM (National Institute of Metrology, China) standards—are supplied with each unit batch and archived digitally for long-term data integrity.

Applications

• Pharmaceutical aseptic processing line environmental monitoring (Grade A–D zones per EU GMP Annex 1)
• Hospital airborne infection isolation room and operating theatre bioaerosol baseline assessment
• Food production facility Listeria monocytogenes and Salmonella surveillance programs
• Research on fungal spore dispersion dynamics in agricultural and indoor environments
• Validation of HVAC filtration efficiency using challenge aerosols (e.g., Bacillus atrophaeus spores)

FAQ

Is the ZR-A03 compatible with non-Junray air sampling pumps?
Yes—provided the pump delivers stable flow at 28.3 L/min (±5%) and interfaces mechanically with standard 1/2-inch NPT or ISO-KF flange connections.
What is the recommended sampling duration for regulatory compliance?
Per ISO 14698-1, typical durations range from 1 to 4 minutes depending on expected bioburden; longer durations require volume correction for evaporation loss.
Can the ZR-A03 be used for viral particle collection?
While primarily validated for culturable bacteria and fungi, studies indicate ≥70% collection efficiency for enveloped viruses (e.g., influenza A) when paired with protein-stabilized collection media.
Does Junray provide method validation support for GMP environments?
Yes—application-specific IQ/OQ documentation, recovery efficiency studies (using Micrococcus luteus and Aspergillus niger spore challenges), and SOP templates are available under NDA.