Thermo Scientific™

Six-Stage Viable Andersen Cascade Impactor

 Related applications:
Environmental

Measure concentration and particle size distribution of aerobic bacteria and fungi in ambient air using the Thermo Scientific™ Six-Stage Viable Andersen Cascade Impactor. This multi-orifice sampler is widely used as a standard for enumerating the viable particles in a microbial aerosol.

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Description

Key Features:
  • Viable particles can be collected on a variety of bacteriological agar and incubated in-situ for counting and identification
  • Sampler is calibrated so all particles collected, regardless of physical size, shape or density are sized aerodynamically and can be directly related to human lung deposition
  • Constructed with six aluminum stages that are held together by three spring clamps and sealed with O-ring gaskets; each impactor stage contains multiple precision-drilled orifices
  • Collection plates are prepared by aseptically pipetting 27mL of sterile bacteriological agar into each of six glass Petri dishes supplied with instrument
  • Air to be sampled enters the inlet cone and cascades through the succeeding orifice stage with successively higher orifice velocities from Stage 1 to Stage 6
  • Successively smaller particles are inertially impacted onto the agar collection surfaces
  • A continuous-duty vacuum pump provides constant air sampler flow of 1 cfm
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