(under subclass 15) Apparatus which is provided with means to indicate a characteristic or change therein (e.g., of the fluid mixture, a separated constituent, or the apparatus, etc.); or means to signal or alert the status of such a characteristic.
SEE OR SEARCH THIS CLASS, SUBCLASS:
18+, for electric field separation apparatus with control means responsive to sensed condition.
25, for electric field separation apparatus with programmed, cyclic, or time responsive control means.
117, for solid sorbent apparatus with indicating, signal, or alarm means combined with programmed, cyclic, or time responsive control means.
417+, for gas separation apparatus with signals, indicators, measuring, or testing means.
SEE OR SEARCH CLASS 73, Measuring and Testing, for measuring and testing procedures and apparatus.
95, Gas Separation: Processes,
25, for gas treating processes with recording or signaling condition.
116, Signals and Indicators, particularly
67+, for alarms and 200+ for indicators.
374, Thermal Measuring and Testing, for thermal measuring methods and devices, particularly
