IPC Subgroup
G01F 23/28 by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
Introduced: September 1968
Last revised: January 2006
Full Title
Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm > by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water > by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
2 direct subcodes
Child Classifications
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- G01F 23/284 Electromagnetic waves
- G01F 23/296 Acoustic waves