CPC Subgroup
G01L 23/08 operated electrically
Full Title
Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid > operated electrically
6 direct subcodes
Child Classifications
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- G01L 23/10 by pressure-sensitive members of the piezoelectric type
- G01L 23/12 by changing capacitance or inductance
- G01L 23/14 by electromagnetic elements
- G01L 23/16 by photoelectric means
- G01L 23/18 by resistance strain gauges