Marcello Pirani
GERMAN PHYSICIST (1880-1968)
Marcello Stefano Pirani; Marcello S. Pirani
Marcello Stefano Pirani (July 1, 1880 – January 11, 1968) was a German physicist known for his invention of the Pirani vacuum gauge, a vacuum gauge based on the principle of heat loss measurement. Throughout his career, he worked on advancing lighting technology and pioneered work on the physics of gas discharge.