Pirani gauge
![Block diagram of Pirani gauge](/Images/godic/202502/03/Blockbild-Pirani-Vakuumeter1942.png")
![Curves to convert air readings to other gases](/Images/godic/202502/03/Nomogramm_pirani-Vakuummeter1942.jpg")
The Pirani gauge is a robust thermal conductivity gauge used for the measurement of the pressures in vacuum systems. It was invented in 1906 by Marcello Pirani.
Pirani gauge
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