| 250 / | HD | RADIANT ENERGY |
| 336.1 | DF | INVISIBLE RADIANT ENERGY RESPONSIVE ELECTRIC SIGNALLING {16} |
| 338.1 | DF | .~ Infrared responsive {12} |
| 339.01 | DF | .~.~ With selection of plural discrete wavelengths or bands {6} |
| 339.06 | DF | .~.~.~ With radiation source {5} |
| 339.1 | ![]() | .~.~.~.~ Determining moisture content |