IPC Main Group
G01F 23/00 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
Introduced: September 1968
Last revised: January 2022
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING VOLUME, VOLUME FLOW, MASS FLOW, OR LIQUID LEVEL; METERING BY VOLUME
Scope Notes
Application references: In wells Adaptation to, or mounting on, steam boilers
Related Keywords
ALARM(S) for liquid levelDIP sticksGAUGE(S) glasses for indicating liquid levelmeasuring water levelindicating or measuring LEVEL(S) of liquidmeasuring height of TIDES
7 direct subcodes
Child Classifications
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- G01F 23/02 by gauge glasses or other apparatus involving a window or transparent tube for directly observing the level to be measured or the level of a liquid column in free communication with the main body of the liquid
- G01F 23/04 by dip members, e.g. dip-sticks
- G01F 23/14 by measurement of pressure
- G01F 23/2 by measurement of weight, e.g. to determine the level of stored liquefied gas
- G01F 23/22 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
- G01F 23/3 by floats
- G01F 23/8 Arrangements for signal processing