IPC Subgroup
G01L 21/3 by making use of ionisation effects
Introduced: September 1968
Last revised: January 2006
Full Title
Vacuum gauges > by making use of ionisation effects
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
Related Keywords
using IONISATION in measuring pressure
3 direct subcodes
Child Classifications
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- G01L 21/32 using electric discharge tubes with thermionic cathodes
- G01L 21/34 using electric discharge tubes with cold cathodes
- G01L 21/36 using radioactive substances