(under the class definition) Apparatus and corresponding methods with means for (a) determining a property or characteristic of the material for the purpose of indicating the property or (b) producing or providing a perceptible manifestation (e.g., audible or visible) of a condition of a part of the apparatus or of a condition or rate of flow of the material.
(1) Note. If feeding of material is automatically controlled by or in response to the determining means, placement is as indicated in the search notes below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
151.1+, for mixing apparatus having feed means responsive to a condition sensor.