Microbial Air Monitoring Systems

Introduction:

Our factory produces HM-QW6 type six stage sieve impact air microbial sampler, which is a dual function multi-stage impact sampler. It can be widely used for monitoring in environments such as hygiene and epidemic prevention, biological cleanliness, pharmaceuticals, fermentation industry, and related research and teaching departments for sampling and research of air microorganisms, providing a basis for evaluating the hazards of air environmental microbial pollution and its prevention and control measures.

The HM-QW6 six stage sieve impact air microbial sampler simulates the anatomical structure and aerodynamic physiological characteristics of the human respiratory tract. The principle of inertial impact is used to collect microbial particles suspended in the air on the surface of the sampling medium in different levels, which are then used for cultivation and microbiological analysis.

The entire instrument consists of an impactor, a main unit (flow meter), a timer, and a tripod. The impactor is a 6-layer aluminum alloy disc with tiny holes. Place agar plates under the discs, with sealing rings between each disc, and firmly connect the discs together through three spring hooks. Each disk has 400 small holes arranged in a circular pattern, gradually decreasing in size, with a standard sampling flow rate of 1 cubic foot (28.3 L/min). When the airflow containing microbial particles enters the upper sampling port, different sizes of microbial particles collide with the corresponding agar surface according to aerodynamic characteristics as the airflow increases layer by layer. The particle size range captured at each level is determined by the airflow velocity of the orifice at that level and the particle interception rate of the previous level. The particles captured in the upper respiratory tract of the first and second levels are similar to those captured in the lower respiratory tract of humans, while the particles captured in the lower respiratory tract of the third to sixth levels are similar to those captured in humans, which to a considerable extent replicates the penetration and deposition of these particles in the respiratory tract.

Features:

The HM-QW6 six stage sieve impact air microbial sampler can not only measure the number of air microorganisms, but also its unique feature is that it can measure the size of these particles, which is one of the important indicators for determining the harm of air microorganisms. It is composed of six impactors combined into one, and each stage is actually a single stage sampler. Using the principle of six repeated impacts, the vast majority of particles, especially those settling in the trachea and lungs, are basically impacted. Therefore, the range of particle sizes collected by it is naturally wider than that of a single stage, which is incomparable to some single stage impact samplers. Moreover, the circular nozzle of the sampler has a higher sampling efficiency than nozzles such as cracks. During sampling, the relative humidity gradually increases (from 39% of level * * to 88% of level 6), which is very beneficial for the survival of fragile pathogenic microorganisms, especially virus particles. Due to its unique characteristics, it has been widely and effectively applied in the monitoring of air microorganisms, and has been widely used since its inception. Recommended by experts as an international standard sampler.

Technical parameters:

Performance parameters: measurement range capture rate: ≥ 98%;

Capture particle range:

**Level: ＞ 7.0 μ Aperture 1.18mm;

Level 2: 4.7 μ M-7.0 μ M aperture 0.91mm;

Third level: 3.3 μ M-4.7 μ M aperture 0.71mm;

Level 4: 2.1 μ M-3.3 μ M aperture 0.53mm;

Level 5: 1.1 μ M-2.1 μ M aperture 0.34mm;

Level 6: 0.65 μ M-1.1 μ M aperture 0.25mm;

The sampling flow rate is adjustable at 28.3L/min, with an accuracy of ≤ 5%;

Noise ≤ 60 dB;

The electronic timer has a range of 1-99 hours and an accuracy of<1%;

Working power supply: AC/DC dual-purpose

Basic configuration:

1 set of main unit (including 1 vacuum pump, 1 flow meter, and 1 timer each)

1 level 6 impactor

One aluminum alloy packaging box for the instrument

One height circle

One set of tripods

1 power cord

One set of connecting pipes

1 instruction manual

1 certificate of conformity

1 warranty card

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