DIFF Subgroup
G01L 21/12 measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
Introduced: September 1968
Full Title
Vacuum gauges > by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured > measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
No child classifications to compare. This is a leaf node in both IPC and CPC.