Atmospheric Measurement Techniques Discussions www.atmos-meas-tech-discuss.net 1867-8610 2 2 2009 10.5194/amtd-2-1099-2009 http://www.atmos-meas-tech-discuss.net/2/1099/2009/ http://www.atmos-meas-tech-discuss.net/2/1099/2009/amtd-2-1099-2009.html http://www.atmos-meas-tech-discuss.net/2/1099/2009/amtd-2-1099-2009.pdf 1099 1141 2009-04-22 Particle Loss Calculator – a new software tool for the assessment of the performance of aerosol inlet systems S.-L. von der Weiden vonders@mpch-mainz.mpg.de F. Drewnick S. Borrmann Particle Chemistry Department, Max Planck Institute for Chemistry, Joh.-J.-Becher-Weg 27, 55128 Mainz, Germany Institute for Atmospheric Physics, Johannes Gutenberg University, Joh.-J.-Becher-Weg 21, 55128 Mainz, Germany Most aerosol measurements require an inlet system to transport aerosols from a select sampling location to a suitable measurement device through some length of tubing. Such inlet systems must be optimized to minimize aerosol sampling artifacts and maximize sampling efficiency. In this study we introduce a new multifunctional software tool (<i>Particle Loss Calculator</i>, PLC) that can be used to quickly determine aerosol sampling efficiency and particle transport losses due to passage through arbitrary tubing systems. The software employs relevant empirical and theoretical relationships found in established literature and accounts for the most important sampling and transport effects that might be encountered during deployment of typical, ground-based ambient aerosol measurements. The software treats non-isoaxial and non-isokinetic aerosol sampling, aerosol diffusion and sedimentation as well as turbulent inertial deposition and inertial deposition in bends and contractions of tubing. 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