Investigating or analyzing materials by the use of thermal means (G01N3/00 - G01N23/00 take precedence)

Child Classifications

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• G01N 25/005
• G01N 25/02 by investigating changes of state or changes of phase; by investigating sintering
• G01N 25/14 by using distillation, extraction, sublimation, condensation, freezing, or crystallisation (G01N25/02 takes precedence)
• G01N 25/16 by investigating thermal coefficient of expansion
• G01N 25/18 by investigating thermal conductivity (by calorimetry G01N25/20; by measuring change of resistance of an electrically-heated body G01N27/18)
• G01N 25/20 by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity (calorimeters per se G01K)
• G01N 25/50 by investigating flash-point; by investigating explosibility
• G01N 25/56 by investigating moisture content
• G01N 25/72 Investigating presence of flaws