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The Penningvac PTR 225 RN pure-filament Pirani cold-cathode gauges use the Penning principle of cold-cathode ionization. Master Bond EP5LTE-100 is a one-part, non-premixed, frozen epoxy with a very low coefficient of thermal expansion (CTE), a high glass transition temperature ( I T i SB g sb ), and a very high modulus. [Extracted from the article]