Anderson
Six
Stage
Volumetric
Sampler - This sampler based on suction is power operated and ideal for indoor environment, though can also be used for outdoor studies. There are six Petri dishes containing suitable growth medium, kept under sieves of different pore size. Each size has 400 pores.
The circular orifice at the top sucks air at flow rate of 28.3 l/min. passing it through the sieve arranged in gradually decreasing order of pore size. Air impacting on last Petri dish goes out. Particles of similar size impact on a given Petri dish only. In this way spores/pollens of six dimension orders are impacted on agar surface of individual Petri dish.
