IPC 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
Last revised: January 2006
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
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE