Loobo LB-NS2112 Microbial Aerosol Concentrator
| Brand | Loobo |
|---|---|
| Origin | Shandong, China |
| Model | LB-NS2112 |
| Primary Flow Rate | 12–120 L/min (±5% accuracy) |
| Concentration Flow Rate | 1.5–15 L/min (±5% accuracy) |
| Flow Repeatability | ±2% |
| Collection Efficiency | >90% for bioaerosol particles ≥3 µm |
| Cut-off Diameter (Da₅₀) | 1.1 µm at 100 L/min, 0.65 µm at 150 L/min, 0.43 µm at 200 L/min |
| Timer Range | 1 s – 99 h 59 min 59 s |
Overview
The Loobo LB-NS2112 Microbial Aerosol Concentrator is an engineered solution for high-efficiency enrichment and collection of viable airborne microorganisms—particularly Legionella pneumophila—from large-volume air streams in HVAC systems. It operates on the Anderson impactor principle, utilizing inertial impaction to separate and concentrate bioaerosols from dilute ambient or ducted air. The instrument integrates a dual-stage architecture: a primary impactor chamber housing precision-machined impaction plates and a downstream collection chamber optimized for microbial viability retention. Designed specifically for compliance-driven environmental monitoring, the LB-NS2112 enables rapid concentration of low-concentration bioaerosols—reducing sampling time without compromising culturability—thereby mitigating biological decay during field deployment. Its performance aligns with Chinese national standard GB/T 18204.5–2013 and health industry specification WS 394–2012, both governing hygiene inspection protocols for centralized air conditioning ventilation systems.
Key Features
- Dual-flow architecture: Independent regulation of primary inlet flow (12–120 L/min) and concentration flow (1.5–15 L/min), each with ±5% volumetric accuracy and ±2% repeatability
- High-efficiency inertial impaction: >90% collection efficiency for bioparticles ≥3 µm, validated under controlled aerodynamic conditions
- Adjustable cut-off diameter (Da₅₀): Dynamically shifts from 1.1 µm (at 100 L/min) to 0.43 µm (at 200 L/min), enabling selective enrichment across respirable and thoracic particle size fractions
- Programmable timer with resolution down to 1 second and maximum duration of 99 hours, 59 minutes, and 59 seconds
- Simultaneous dual-channel sampling capability for parallel collection or method validation studies
- Manually adjustable flow control valves—no software dependency for field operation
- Modular mechanical design including telescoping sampling mast (standard 3 m; optional 4 m), two tripod configurations (2 m and 3 m), and integrated leveling platform for stable deployment on uneven surfaces
Sample Compatibility & Compliance
The LB-NS2112 is validated for use with standard microbiological collection media, including agar-based contact plates (e.g., GVPC, BCYE), liquid impingers (e.g., AGI-30), and sterile filter membranes compatible with subsequent culture, PCR, or qPCR analysis. Its physical design and airflow calibration ensure compatibility with ISO 14698-1:2003 (Biocontamination control — Part 1: General principles and methods) guidance for viable particle sampling in controlled environments. While not certified to ASTM D6785 or ISO 21501-4, its operational parameters are traceable to NIST-traceable flow calibrators used during factory verification. The device meets the functional requirements of GB/T 18204.5–2013 for HVAC system surveillance and supports audit-ready documentation when paired with GLP-compliant lab notebooks and chain-of-custody logs.
Software & Data Management
The LB-NS2112 is a hardware-only, analog-operated concentrator with no embedded firmware or digital interface. All operational parameters—including flow settings, timer activation, and sampling duration—are configured manually via calibrated rotameters and mechanical timers. This architecture eliminates cybersecurity vulnerabilities, ensures long-term operational continuity without software obsolescence, and simplifies regulatory validation in GMP or CLIA-aligned laboratories where deterministic, non-programmable instrumentation is preferred. Users maintain full control over data integrity by recording flow values, start/stop times, and environmental conditions directly into laboratory notebooks or LIMS-integrated forms.
Applications
- Routine surveillance of Legionella pneumophila in centralized HVAC supply air, particularly in hospitals, hotels, and large commercial buildings
- Validation of HVAC filtration and disinfection efficacy through pre- and post-treatment bioaerosol concentration comparisons
- Occupational exposure assessment in biopharmaceutical cleanrooms and fermentation facilities
- Field-based epidemiological studies requiring high-volume, short-duration sampling to preserve microbial viability
- Method development and inter-laboratory comparison studies for aerosolized pathogen recovery efficiency
FAQ
Is the LB-NS2112 suitable for ISO 14644-1 classified cleanrooms?
Yes—when operated with appropriate sterile accessories and validated collection media, it supports viable particle monitoring in ISO Class 5–8 environments.
Does the device support automated data logging?
No—it is a fully manual, non-digital instrument. All operational data must be recorded externally.
Can the cut-off diameter be recalibrated in-field?
No—Da₅₀ values are fixed by nozzle geometry and flow rate; users select target Da₅₀ by setting the specified primary flow rate per manufacturer’s calibration chart.
What maintenance is required between sampling events?
Impaction plates and collection surfaces must be sterilized or replaced; flow paths should be inspected for particulate accumulation; rotameters require annual verification against a primary standard.
Is the unit compliant with FDA 21 CFR Part 11?
Not applicable—the absence of electronic records or signature functionality places it outside the scope of Part 11 requirements.
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