IPC Subgroup
G01L 21/28 using torsional rotary measuring members
Introduced: September 1968
Last revised: January 2006
Full Title
Vacuum gauges > 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 > using torsional rotary measuring members
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE