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HD-QW6
Introduction：
Six-stage Air Microbial Sampler is a cascade impactor for sampling airborne microorganisms. Widely used for health and epidemic prevention, biological cleanliness, pharmaceutical, fermentation and research institutions to evaluate air microbial contamination....
The HD-QW6 six-stage sieve impactor air microbiological sampler is a dual-function staged multi-stage impact sampler widely used for monitoring in hygiene and epidemic prevention, bioclean rooms, pharmaceutical and fermentation industries, as well as for air-microbiology sampling research in related teaching departments, providing a basis for evaluating microbial pollution hazards and control measures in the air environment. It simulates the anatomical structure and aerodynamic physiological characteristics of the human respiratory tract, collecting suspended microbial particles onto the sampling medium by inertial impaction for culture and microbiological analysis. The instrument consists of an impactor, a host (flowmeter), a timer and a tripod. The impactor is composed of six aluminum discs with tiny holes; beneath each disc is an agar plate sealed with a rubber ring and held together by three spring hooks. Each disc has 400 ring-arranged, progressively smaller, precisely sized holes, with a standard sampling flow of 1 ft³ (28.3 L/min).
Besides measuring the quantity of air microbes, its unique capability is determining particle size — a key indicator for judging microbial hazard.
Six impactors combined into one unit; each stage is essentially a single-stage sampler using 6-time repeated impaction, capturing most particles (especially those depositing in the trachea and lungs) — a far wider size range than single-stage samplers, with higher efficiency than slit nozzles.
Relative humidity increases stage by stage (from 39% at stage 1 to 88% at stage 6), which favors the survival of fragile pathogenic microorganisms, especially viruses.
Owing to these distinctive features it is widely and effectively used in air-microbiology monitoring and recommended by experts as an international-standard sampler.
| Parameter | Specification |
|---|---|
| Capture rate | ≥98% |
| Stage 1 particle size | >7.0 μm (aperture 1.18 mm) |
| Stage 2 particle size | 4.7 – 7.0 μm (aperture 0.91 mm) |
| Stage 3 particle size | 3.3 – 4.7 μm (aperture 0.71 mm) |
| Stage 4 particle size | 2.1 – 3.3 μm (aperture 0.53 mm) |
| Stage 5 particle size | 1.1 – 2.1 μm (aperture 0.34 mm) |
| Stage 6 particle size | 0.65 – 1.1 μm (aperture 0.25 mm) |
| Sampling flow | 28.3 L/min adjustable, accuracy ≤5% |
| Noise | ≤60 dB |
| Electronic timer | 0 – 99 h 99 s, accuracy <0.2% |
| Power | AC/DC dual-use |
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