Marcello Stefano Pirani: who was he?

There is a name that often echoes in our laboratories and is unknown to most: Marcello Stefano Pirani. The scientist who invented the method for measuring vacuum. And to whom we have dedicated one of our 'Best Sellers': the Pirani Vacuum Logger. But how did Pirani figure out how to measure vacuum? Here is the article that explains it: https://www.tecnosoft.eu/media/attachment/PiraniVacuumLogger_NameOrigin_en.pdf