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This study compares the traditional Old Kahn Gas Hygrometer to the new Cermet II unit, analyzing sensor compatibility with harsh gases like CF4. The metalized ceramic sensor in Cermet II is scrutinized against Panametrics' Al-oxide sensor. The experiment involves parallel Ar flow through both sensors to assess performance.
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Old Kahn Gas Out to Panametrics Gas (Ar) In New Kahn Comparing Old Kahn to New Kahn Hygrometer • Kahn “Cermet II” has metalized ceramic sensor that is supposedly compatible • with harsh gases (unlike Al-oxide sensor of Panametrics) • Old Kahn cumulative exposure to CF4 for 3-4months • Compare old Kahn to New Cermet II unit by flowing Ar in parallel through both sensors