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https://airbornescience.nasa.gov/content/Characterizing_the_performance_of_a_POPS_miniaturized_optical_particle_counter_when_operated Characterizing the performance of a POPS miniaturized optical particle counter when operated on a... optical particle counter https://ub01.uni-tuebingen.de/xmlui/handle/10900/167719 Small-Scale Diffusion Dryer on an Optical Particle Counter for High-Humidity Aerosol Measurements... https://amt.copernicus.org/articles/11/709/2018/ AMT - Evaluation of a low-cost optical particle counter (Alphasense OPC-N2) for ambient air...