Monitoring nephelometer Aurora™ 4000

Aerosol particles in the atmosphere directly influence the Earth’s radiative balance by absorbing and scattering the solar radiation and indirectly, by changing the microphysical properties of clouds. Aurora 4000, the world’s first commercially available polar nephelometer, provides measurements of integrated light scattering between 10°- 90° and 180°, with the user able to select up to 18 separate angles between the 10° to 90° starting angle of the integration. Features WIDE RANGE Wide measurement range (0.1 to 20,000 Mm-1) BROAD BACKSCATTER SHUTTER POSITIONING 18 angular sectors; fully-integrated scattering, as well as integrated scattering of up to 17 different angular sectors from 10˚ to 90˚ through to 170˚ CUSTOMISED DATA ANALYSIS Raw measurement counts available for customised data analysis FUNCTIONAL FLEXIBILITY Mass flow control option enables flow to be controlled in conjunction with an external pump IN-BUILT SAFETY An automatic bypass ball valve option protects against contamination of a common sampling manifold during calibration TOTAL PACKAGE Fully integrated package including internal sample pump, sample heater, internal calibration valves, zero air pump & data logger The technology behind the insight / Class-leading technology The Aurora™ 4000 builds on the same three wavelength capabilities as the Aurora™ 3000. It provides measurements of light scattering up to 18 user-selectable angular sectors, using varied backscatter shutter positioning. It can simultaneously measure at 450 nm (blue), 525 nm (green) and 635 nm (red), using the proven LED light source (Müller et al., AMT, 2011)