Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
G - PHYSICS
G05 - CONTROLLING
G05D - SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T137/7306 - Electrical characteristic sensing
Y10T137/877 - With flow control means for branched passages
Y10T137/7976 - Plural separating elements
Y10T137/2509 - By optical or chemical property
Y10T137/86187 - Plural tanks or compartments connected for serial flow
G - PHYSICS
G05 - CONTROLLING
G05D - SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
G05D9/12 - characterised by the use of electric means
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T137/86903 - Plural petcocks
B - PERFORMING OPERATIONS
B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D - SEPARATION
B01D59/40 - by electrolysis
B01D59/42 - by electromigration
Y - NEW / CROSS SECTIONAL TECHNOLOGIES
Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
Y10T137/034 - Controlled by conductivity of mixture