DIFF Subgroup
G01F 1/22 by variable-area meters
Introduced: July 1974
Full Title
Full titles differ between systems:
IPC:
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow > by using mechanical effects > by detection of dynamic effects of the flow > by variable-area meters
CPC:
Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow (measuring a proportion of the volume flow G01F5/00) > by using mechanical effects > by detection of dynamic effects of the flow > by variable-area meters
IPC and CPC are identically structured here. All 2 subcodes exist in both systems.
IPC defines codes here since 1974.
Child Classifications
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- G01F 1/24 with magnetic or electric coupling to the indicating device since 1974 IPC+CPC Available in IPC and CPC