Andersen Cascade Impactors 8-stage ZR-A05

Junray Andersen cascade impactors are used for the collection of airborne aerosols containing bacteria or fungi. These devices come in 8-stage (ZR-A05), 6-stage (ZR-A02), or 2-stage (ZR-A01) variations. These impactors are precision-machined out of high-quality anti-corrosion aluminum alloy plates with successively smaller diameter holes. As the ambient air cascades through the different stages, the corresponding particulates impact the stage as the smaller particulates continue to travel through the stages until they are entrapped on the corresponding plate. These viable bacterial particulates are then incubated and then counted or analyzed.

The 8-Stage Andersen Cascade Impactor ZR-A05 is a multi-hole, laminated collision (air) sampler commonly used for the measurement of aerobic bacteria and fungi concentration and particle size distribution in the environment. The sampler collects all particles regardless of physical size, shape, or density based on their deposition in the human lungs.

A petri dish filled with agar medium is placed in each stage of the impactor to collect microbial particles in the air. During the sampling process, the microbial particles will remain on the culture medium due to the impact of the airflow. After the petri dish is taken out and cultured, we can count the total number of colonies or perform individual colony analysis.