TERMIUM Plus^®

Fiche 1,  Justifications,  Anglais

Record number: 1, Textual support number: 1 DEF

An instrument developed by John Aitken for determining the dust content of the atmosphere. In operation, a sample of air is mixed, in an expandable chamber, with a larger volume of dust-free air containing water vapor. Upon a sudden expansion, the chamber cools adiabatically below its dewpoint, and droplets form with the dust particles as nuclei (Aitken nuclei). A portion of these droplets settle on a ruled plate in the instrument and are counted with the aid of a microscope.  1, fiche 1, Anglais, - Aitken%20dust%2Dcounter

Fiche 1,  Justifications,  Français

Record number: 1, Textual support number: 1 OBS

"Pulvimètre" n'est pas attesté dans les dictionnaires généraux mais on l'utilise couramment dans les documents techniques.  2, fiche 1, Français, - pulvim%C3%A8tre%20d%27Aitken

Fiche 1,  Justifications,  Espagnol