IPC Subgroup
G01L 21/1 by measuring variations in the heat conductivity of the medium, the pressure of which is to be measured
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
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
2 direct subcodes
Child Classifications
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- G01L 21/12 measuring changes in electric resistance of measuring members, e.g. of filaments; Vacuum gauges of the Pirani type
- G01L 21/14 using thermocouples