INRiM Technical Report 26/2020 - Indoor and outdoor measurements of particulate matter concentration in air during wintertime performed in INRiM Campus and in the CNR Research Area of Turin by using particle counters

This technical report shows the study of the concentration of particulate matter in air performed in different environments (outdoor, indoor and in underground laboratories) by using two particle counters. Measurements were carried out in different climatic conditions during wintertime over three weeks into INRiM Campus and in the CNR Research Area of Turin. In order to compare the results obtained using portable airborne particle counter with those of A.R.P.A. Piemonte, a spreadsheet for transforming particles number in air into particles concentration was implemented, by assuming a spherical shape of the particles and a density d = 1 g ∙ cm−3. Finally, two different particle analysers are compared, obtaining a result agreement within 13 %.