offers a large selection of instruments for carbon sensing.

Photo-Acoustic Soot Spectrometer, Single-Wavelength (PASS-1): The PASS-1 is a sensitive, high-resolution, fast-response instrument for measuring the absorption coefficient of aerosol particles. This instrument has no filters to change and requires no intervention by the operator. The PASS is ideal for air quality monitoring and biomass burning studies, as well as for soot measurement in exhaust plumes from power plants and diesel engines. read more =>   Photo-Acoustic Soot and Aerosol Sensor, Three Wavelength (PASS-3): The PASS-3 is a sensitive, high-resolution, fast-response instrument for measuring the absorption coefficient of aerosol particles. It uses three wavelengths (red, green, and blue) to enhance measurement capabilities. read more =>   Single Particle Soot Photometer (SP2): This is an ideal instrument for soot measurement. The SP2 is the only probe in the world that directly measures the black carbon, known as soot, in individual aerosol particles. The high sensitivity, fast response, and specificity to elemental carbon makes it the premier instrument for characterizing pollution sources, soot in snow, ice or water, calibrating aethalometers and documenting thin, atmospheric layers of contamination. read more =>