PM 10 and PM 2.5 MFC Dichotomous Sampler is a type of air sampler that is commonly used in environmental monitoring and research. It is designed to collect particulate matter (PM) from the air and is capable of discriminating between two size fractions of PM, namely PM 10 and PM 2.5.
PM 10 refers to particles with a diameter of 10 micrometers or less, while PM 2.5 refers to particles with a diameter of 2.5 micrometers or less. Both types of particulate matter are of concern for public health because they can penetrate deep into the respiratory system and cause respiratory and cardiovascular problems.
The sampler works by drawing air through a series of filters, which separate the PM based on their size. The PM 10 fraction is collected on a filter with a pore size of 10 micrometers, while the PM 2.5 fraction is collected on a filter with a pore size of 2.5 micrometers. The sampler is equipped with a mass flow controller (MFC) to ensure a constant flow rate during sampling, which is essential for accurate measurements. The split flow configuration of the virtual impactor allows a PM10 aerosol to be separated into fine particles and coarse particles for subsequent collection onto 2 separate PTFE membrane filters.
Once the sampling is complete, the filters are removed and weighed to determine the mass of PM collected. The results can be used to assess the levels of particulate matter in the air and to evaluate the effectiveness of pollution control measures.
The PM 10 and PM 2.5 MFC Dichotomous Sampler is a valuable tool for monitoring air quality and understanding the impacts of particulate matter on human health and the environment

The other sampler is the PM2.5 Fine Particulate sampler (APM555MFC).

APM 555 MFC sampler through an omnidirectional inlet designed to provide a clear aerodynamic cut point for particles larger than 10 microns.