Pirani gauge

A Pirani gauge is a type of vacuum gauge used to measure very low pressures, typically in the range of 10^-3 to 10^-9 Torr (or similar units). It operates on the principle of thermal conductivity, which is influenced by the density of gas molecules surrounding a heated element. ### Key Features and Operation: 1. **Basic Components**: The Pirani gauge typically consists of a filament (or wire) that is heated electrically.