The Thermo Scientific Model 5012 MAAP Multi-Angle Absorption Photometer precisely measures the loading of black carbon in the atmosphere using a radiative transfer scheme to particle loaded glass fiber filters.

The BC content of the aerosols is continuously determined by simultaneously measuring the optical absorption and scattering of light by the particles collected on the filter tape. The combination of these two techniques as utilized by the Model 5012 MAAP provides a much truer measurement of the black carbon content.