Vacuum gauges

Child Classifications

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• G01L 21/02 having a compression chamber in which gas, whose pressure is to be measured, is compressed IPC+CPC Available in IPC and CPC
• G01L 21/08 by measuring variations in the transmission of acoustic waves through the medium, the pressure of which is to be measured IPC+CPC Available in IPC and CPC
• G01L 21/10 by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured IPC+CPC Available in IPC and CPC
• G01L 21/16 by measuring variation of frictional resistance of gases IPC+CPC Available in IPC and CPC
• G01L 21/26 by making use of radiometer action, i.e. of the pressure caused by the momentum of molecules passing from a hotter to a cooler member; Vacuum gauges of the Knudsen type IPC+CPC Available in IPC and CPC
• G01L 21/30 by making use of ionisation effects IPC+CPC Available in IPC and CPC