HTabsOverviewThe GFAS-DPOL combines a high-sensitivity forward & back scatter intensity particle size measurement with a polarization detection measurement and a wind direction and wind-speed measurement. It is used for understanding fog formation, development and decay, and deriving number concentration, liquid water content, extinction coefficient and visibility in warm and mixed-phase fog. Key Features Detailed data on fog composition Measure the properties of complex fog/smog particles to better understand their composition and forecast their occurrence Scatter optics plus polarization The shape factor is used to differentiate liquid droplets from ice crystals, dust particles or ash from biomass burning. The complex refractive index determines if fog droplets are mixed with either dissolved or insoluble material. Complete solution Instrument Features include integrated sample aspiration pump, integrated control & data logging computer, integrated ultrasonic anemometer for wind-speed & -direction, Self-orientation to wind direction, Power filter and transient suppressor GFAS Brochure.pdf SpecificationSpecification: Parameter Specification Measured Parameters Forward & back scatter measurementsPolarization detection measurements Auxiliary Parameters Wind speedTemperaturePressure Derived Parameters Particle diameterParticle number concentrationPolarization ratioLiquid water contentEffective diameterMedian volume diameter Particle Size Range 0.5-50 µm diameter Number of Size Bins 30 Typical Sample Area 0.24 mm² Sample Flow Volume 1 m3/min Sampling Frequency Standard Data Rate: Selectable, 0.04 sec to 20 secPBP Data Rate: No limit until particles are coincident Refractive Index Non-absorbing, 1.33 (the industry standard for water) Light Collection Angles Forward: ~3.5º - 12ºBack: ~ 183.5° - 192° Data System Interface Ethernet Environmental Operating Conditions Temperature: -40 to 45 °C (except in heavy icing conditions)Relative Humidity: 0 - 100%, non-condensingAltitude: 0 - 4,000 meters Probe Dimensions 63 cm H x 39 cm W x 75 cm L Power Requirements Universal Power Supply: 85 – 265 VAC / 50/60 Hz / 600 W Further InfoDocuments: GFAS Brochure.pdf
