G01F 23/296 Acoustic waves
Introduced: January 1995
Full Title
Full titles differ between systems:
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 > Acoustic waves
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 (involving the use of floats G01F23/30) > by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material > Acoustic waves
CPC subdivides this area 3x more granularly than IPC with 3 additional codes.
3 codes are CPC-only extensions.
IPC defines codes here since 2022.
Child Classifications
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- G01F 23/2962 Measuring transit time of reflected waves since 2022 +1 CPC IPC+CPC Available in IPC and CPC