| 324 / | HD | ELECTRICITY: MEASURING AND TESTING |
| 600 | DF | IMPEDANCE, ADMITTANCE OR OTHER QUANTITIES REPRESENTATIVE OF ELECTRICAL STIMULUS/RESPONSE RELATIONSHIPS {8} |
| 602 | DF | .~ With auxiliary means to condition stimulus/response signals {3} |
| 609 | ![]() | .~.~ For sensing {2} |
| 610 | DF | .~.~.~> Including a bridge circuit |
| 611 | DF | .~.~.~> Including a remote type circuit |