Cloud Condensation Nuclei Counter (CCN):This instrument counts cloud condensation nuclei (CCN). It is being used in laboratories to measure how different materials form cloud droplets, in urban environments to study how pollution affects cloud and precipitation formation, and in weather modification to determine when and where to seed clouds. more information =>

Spectrometer for Ice Nuclei (SPIN):This instrument is the first commercially available ice nuclei counter, with a particle detection range from 0.3 – 10 μm. Particle detection allows for individual particle sizing and discrimination of ice and water particles using polarization change in the scattered light. more information =>

Passive Cavity Aerosol Spectrometer Probe (PCASP-X2): This optical spectrometer measures small particles in the 0.10 - 10.0 µm diameter range. more information =>

Meteorological Particle Spectrometer (MPS): This precipitation-measuring optical disdrometer, used by the National Weather Service for rain and drizzle research, measures the size distribution, fall velocity and rain rate of droplets from 50 µm to greater than 6.4 mm. more information =>

Fog Monitor (FM-100): This optical spectrometer continuously samples droplet-laden ambient air and produces size distributions in the range from 2 - 50 µm. more information =>

Photoacoustic Extinctiometer (PAX): This is a sensitive, high-resolution, fast-response instrument for measuring optical aerosol properties relevant for climate radiative forcing and carbon particle sensing. more information =>

Single Particle Soot Photometer (SP2): This is an ideal instrument for measuring black carbon, known as soot. It is the only probe in the world that directly measures the black carbon in individual aerosol particles. Its high sensitivity and fast response makes it the premier instrument for characterizing pollution sources and measuring black carbon in snow, ice or water. more information =>

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. more information =>

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. The PASS-1 is well suited for air quality monitoring, biomass burning studies, and black carbon measurement in exhaust plumes. more information =>