Our GS 100 Microbial Air Sampler collects ambient air samples for microbiological testing. Following the Anderson Airsampler Principle, it draws in the ambient air over a nozzle plate. The thermal mass flow meter accurately regulates the flow. Without going through filters or nutrient solutions, particles and germs are deposited on a underlying Petri dish with nutrient solution. The cultivation of the colony-forming units can then take place directly. The germination number is determined using conventional methods.