vacuum gauge
Quick Summary
A vacuum gauge is a device used to measure the degree of rarefaction, or how much pressure is below atmospheric levels. This measurement is crucial in vacuum technology, which involves processes and physical measurements conducted under reduced atmospheric pressure.12
Vacuum technology is employed for several reasons:
* To prevent unwanted chemical or physical reactions by removing atmospheric components.2
* To disturb equilibrium conditions, such as removing dissolved gases or volatile liquids, or releasing adsorbed gases from surfaces.2
* To increase the distance particles travel without collision, which is important in applications like vacuum coating and particle accelerators.2
* To reduce molecular impacts, thereby minimizing contamination of surfaces prepared in a vacuum.2
The measurement of vacuum is often expressed in units like torr or pascals, with one standard atmosphere equaling 760 torr.2
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