G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
G01N27/416—Systems
G01N27/4166—Systems measuring a particular property of an electrolyte