Devices or apparatus for measuring differences of two or more fluid pressure values

Introduced: September 1968

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

Child Classifications

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G01L 13/02 using elastically-deformable members or pistons as sensing elements +4 CPC IPC+CPC Available in IPC and CPC
G01L 13/04 using floats or liquids as sensing elements IPC+CPC Available in IPC and CPC
G01L 13/06 using electric or magnetic pressure-sensitive elements IPC+CPC Available in IPC and CPC