The Magee Scientific Carbonaceous Aerosol Speciation System (CASS), is a combined unit of a TCA08 Total Carbon Analyzer, and the Magee Scientific Aethalometer® AE33, providing a revolutionary scientific instrument that measures the Total Carbon Content (“TC”), the Elemental Carbon content (EC), the Organic Carbon content (OC) and the Black Carbon content (BC) of suspended aerosol particles in near-Real Time.