HTabsOverviewThe PAX is a sensitive, high-resolution, fast-response instrument for measuring aerosol optical properties relevant for climate change and carbon particle sensing. Key Features Direct in-situ measurements Get accurate measurements for both light absorption and scattering in a single instrument. Then correlate the absorption measurement black carbon mass concentration. Seamless efficiency Get continuous and autonomous operation, with no filter collection required and no filter data artifacts. Real-time results Count on fast response, one-second resolution, and real-time data display on a high-resolution touch screen. Tech-enabled sensitivity Achieve excellent scattering coefficient sensitivity with reciprocal nephelometry. Advanced versatility Select from three wavelengths (870 nm [standard], optional 405 nm, or 532 nm), and get wide dynamic range suitable for pristine regions to source sampling. PAX Brochure.pdf SpecificationSpecification: Parameter Specification Measured Parameters Absorption coefficient, Babs Scattering coefficient, Bscat Auxiliary Parameters Temperature Pressure Relative Humidity Derived Parameters Black carbon (BC) mass Extinction coefficient, Bext Single scattering albedo, SSA Dew Point Measurement Range – Absorption and Scattering < 1 Mm-1 – 10,000 Mm-1 (870 nm, 60 sec. averaging) Laser 870 nm (1.4 W) Modulation Frequency: 1500 Hz nominal, square wave Angular Integration for Scattering 6° to 174° Sample Flow 1 L/min Flow Control: Critical orifice Diaphragm Pump Response Time < 10 sec; one-second resolution Data Averaging Time 1, 10 or 60 seconds, user selectable Zero Check On demand, or automated at user selectable interval at 5, 15, 20, 30, or 60 minutes. Zero check with high-efficiency filtered air sample. Front Panel Features Graphical color touch-panel display screen Two USB-A ports Power switch User interface via touch screen or standard keyboard Rear Panel Connections Sample inlet (compression fitting for ¼” tube) Pump exhaust (compression fitting for ¼” tube) AC and DC power connections Serial RS-232 jack Ethernet port Two analog BNC inputs Four analog BNC outputs Data Storage Capacity > 200 days Communications Output Ethernet 100/10 Mbps, RS-232 Serial Power Requirements 90 – 264 V, 47 – 63 Hz (AC Power) or 12 VDC Power Consumption 45 W Dimensions 18 cm H x 48 cm W x 61 cm D (7" H x 19" W x 24" D); rack mountable Weight 18 kg (40 lb) Environmental Operating Conditions Temperature: 0 – 40°C (32 – 104°F) RH: 0 – 90% RH non-condensing Computer Requirements for PMC Software (Computer not included) Windows XP, Vista, or Windows 7 Minimum 1GB RAM Further InfoDocuments: PAX Brochure.pdf
