73 / | HD | MEASURING AND TESTING |
861 | DF | VOLUME OR RATE OF FLOW {23} |
861.08 | DF | .~ By measuring electrical or magnetic properties {2} |
861.11 | DF | .~.~ Electromagnetic induction (e.g., Faraday type) {1} |
861.12 | DF | .~.~.~ With detecting electrodes {4} |
861.14 | .~.~.~.~ For dielectric fluids |