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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
G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
G01N27/223—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance for determining moisture content, e.g. humidity
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FR984926D1943-10-121943-10-12Perfectionnements apportés aux procédés et appareils pour déterminer les caractéristiques d'un fluide, notamment gazeux
ExpiredFR984926A
(fr)
Perfectionnements apportés aux procédés et appareils pour mesurer ou vérifier une grandeur, notamment les dimensions d'une pièce, par micrométrie pneumatique