Hosted by: Janek Uin

A parallel electrical aerosol spectrometer is essentially a differential mobility analyzer with many output sections and measurement channels. Instead of varying the analyzer voltage to scan over a range of particle mobilities, the whole distribution is captured at once. The principle is used by the Neutral cluster and Air Ion spectrometer (NAIS) to measure ions in the size range from 0.8 nm to 40 nm and neutral particles from 2 nm to 40 nm. The instrument is used in many places around the world, from polluted downtowns to jungles and mountain tops, to study new particle formation and other aerosol phenomena. The talk will give an overview of the principles and designs of the NAIS and other aerosol instrumentation developed at the University of Tartu and the spin-off company Airel Ltd.