The SootScan™ Model OT21 Optical Transmissometer bench top analyzer is a simple and robust instrument which measures the Black Carbon content of an aerosol sample collected on a filter, either from  ambient air or from source emissions.

The SootScan™ Model OT21 Optical Transmissometer can analyze aerosol samples quickly and easily in the field or the laboratory, to determine optical attenuation and BC / BrC mass results.  The analysis is performed at two wavelengths (880 nm, definitive for “Black” Carbon; and 370 nm, where enhanced optical absorption may indicate the presence of “Brown” Carbon aerosol derived from biomass combustion.)

The analysis is non-contact, non-contaminating and non-destructive.  It may therefore be performed before other laboratory techniques are applied to the sample.  The analysis method requires no support gases or consumables.  A neutral density photometric standard kit is available for verifying instrument calibration and validating the instrument response.

The SootScan™ Model OT21 Optical Transmissometer bench top analyzer has been developed as a simple and robust way of measuring the Black Carbon content of particulate matter (PM) collected on sample filters.  The analysis can be easily performed in the field or the laboratory, and provides optical attenuation and BC mass results in only a few seconds.  The analysis is non-contact, non-contaminating and non-destructive.  It may therefore be performed before other laboratory techniques are applied to the sample.  It requires no support gases or consumables.  A neutral density photometric standard kit is available for verifying instrument calibration and validating the instrument response.