(under the class definition) Apparatus in which an operating condition of the apparatus is controlled by variations of a constituent quality of a liquid mixture as determined by physical or chemical tests of the liquid mixture.
SEE OR SEARCH THIS CLASS, SUBCLASS:
662, for composition testing in ion exchange or sorption processes.
SEE OR SEARCH CLASS
23, Chemistry: Physical Processes,
230, for analytical and analytical control methods there provided for.
137, Fluid Handling,
3+, for processes of mixing plural fluids of diverse characteristics; and subclasses 88+ for a system involving mixture condition maintaining or sensing.
