by using fluid or vacuum

Introduced: September 1968

Full Title

Full titles differ between systems:

IPC:

Investigating fluid tightness of structures > by using fluid or vacuum

CPC:

Investigating fluid-tightness of structures > by using fluid or vacuum

Of 6 combined children, 3 exist in both systems.

3 codes are CPC-only extensions.

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G01M 3/022 CPC only CPC only
G01M 3/025 CPC only CPC only
G01M 3/027 CPC only CPC only
G01M 3/04 by detecting the presence of fluid at the leakage point +1 CPC IPC+CPC Available in IPC and CPC
G01M 3/26 by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors IPC+CPC Available in IPC and CPC
G01M 3/36 by detecting change in dimensions of the structure being tested +2 CPC IPC+CPC Available in IPC and CPC