Investigating or analysing materials by the use of electric, electrochemical, or magnetic means (G01N3/00 – G01N25/00 take precedence; measurement or testing of electric or magnetic variables or of electric or magnetic properties of materials G01R)

Child Classifications

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• G01N 27/002
• G01N 27/007
• G01N 27/02 by investigating impedance
• G01N 27/26 by investigating electrochemical variables; by using electrolysis or electrophoresis
• G01N 27/60 by investigating electrostatic variables
• G01N 27/62 by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
• G01N 27/72 by investigating magnetic variables
• G01N 27/92 by investigating breakdown voltage (G01N27/60, G01N27/62 take precedence)