With electric circuitry or electric circuit component detail:
(under subclass 29.02) Subject matter wherein significance is attributed to an electric circuit arrangement or to an electric circuit component having a parameter which is varied due to the effect of the humidity thereon.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing, appropriate subclasses for a device wherein the atmosphere or gas changes in electrical conductance in response to humidity and such property is taken as a measure of humidity. Where no electrical property of the material under test is measured but an additional element is exposed to the material to have its electrical properties affected by a physical property of the material and an electrical property of the additional element is measured, the art is in Class 73, Measuring and Testing.
338, Electrical Resistors,
35, for electrical resistors whose resistance value is responsive to humidity or change in humidity.
