Microbial Air Monitoring SystemsWorking principle:

samplerIn addition to being able to measure the quantity of airborne microorganisms, its * characteristics can also measure the size of these particles, which is one of the important indicators for determining the harm of airborne microorganisms. It is composed of six impactors combined into one, with each stage actually being a single-stage sampler, utilizing6The principle of repeated impact is that the vast majority of particles, especially those settling in the trachea and lungs, are mostly impacted. Therefore, the particle size range collected by it is naturally wider than that of single-stage impact samplers. This is the case with some single-stage impact samplers, and the circular nozzle of the sampler has higher sampling efficiency than the slit nozzle. The relative humidity increases step by step during sampling (from * level)39%Increased to Level 688%）This is very beneficial for the survival of fragile pathogenic microorganisms, especially virus particles. Due to its unique characteristics, it has been widely and effectively used for monitoring airborne microorganisms, and has been widely used since its inception. Used as a standard sampler. The six level air microbial sampler simulates the anatomical structure and aerodynamic physiological characteristics of the human respiratory tract. Based on the principle of inertial impact sampling, microbial particles suspended in the air are collected in stages on the surface of the sampling medium for cultivation and microbiological analysis. The entire instrument of the six level air microbial sampler consists of an impactor, a main unit (flow meter), a timer, and a tripod. The impactor is6Aluminum alloy disc with tiny holes in the layer. Place the agar plates on top of the discs, with sealing rings between each disc. The discs are firmly connected together using three spring hooks. There are on each disc400Arranged in a circular pattern, decreasing layer by layer, with a standard sampling flow rate of1Cubic feet（28.3L/min）. When the airflow containing microbial particles enters the upper sampling port, due to the gradual increase of the airflow layer by layer, microbial ions of different sizes collide with the corresponding agar surfaces according to aerodynamic characteristics. The size range of particles captured at each level is determined by the airflow velocity of the holes in that level and the particle interception rate of the previous level. *Particles captured by the upper respiratory tract similar to humans at the second level3-6The particles captured by the lower respiratory tract are similar to those of humans, which to a considerable extent replicates the penetration and deposition of these particles in the respiratory tract. The six level air microbial sampler can provide petri dishes with regular nutrient agar added.