V.I. Dobrovolsky Al’manac of Modern Metrology № 2 (14) 2018, pages 14–19 The report presents the description, metrological characteristics and application areas of the state primary standards: the pH of the activity of hydrogen ions in aqueous solutions, the activity rate pX ions in aqueous solutions, units of disperse composition of aerosols, suspensions and powders, units … Continue reading Standard base of FGUP “VNIIFTRI” in the field of physical and chemical and electrical measurements