How the MAS-100 Microbial Air Monitoring Systems work
The MAS-100 Microbial Air Monitoring Systems are high-performance instruments which are
based on the principle of the Andersen air sampler. Air is aspirated through
a perforated lid, and impacted onto the surface of growth media in a
standard 90 mm Petri dish or 60 mm contact plate. Micro organisms impact
the culture media and the colonies are counted after proper incubation
period. The system measures the inflow of air and regulates the aspirated
volume to a constant value of 100 liters/min. All MAS-100 air samplers
comply with the guidelines of the ISO 14698 part 1 and part 2.
Sample collection accuracy
The MAS-100® Microbial Air Monitoring Systems provide the most accurate sample
collection available. The MAS-100® systems (except the
MAS-100 Eco®) utilize a state-of-the-art
mass flow sensor to assure a constant air
flow rate of 100 liters/min. The mass flow
sensor continuously regulates the air
flow rate during sample collection. This
allows the MAS-100® system to
automatically adjust for differences in
fill volume of Petri dishes, changes
in air density and differences between
individual perforated lids.