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2400 Philmont Ave. PO Box 662 Huntingdon Valley, PA 19006 U.S.A. Phone: (215) 938-4400 Fax: (215) 947-7464 Email: techin@etigauges.com

Ultra-High and Extreme Ultra-High Vacuum Gauges&endash; Patent Applied For X-ray induced emission of electrons from the ion collector of a Bayard-Alpert gauge is recognized as a cause of falsely high readings at low pressures and is a characteristic of all Bayard-Alpert gauges. The error in the UHV range can exceed 50% with a conventional Bayard-Alpert gauge. The patented ETI gauge essentially eliminates the x-ray error by use of high stability materials and a patented x-ray cancellation technique. This is a high-performance gauge that requires a special gauge controller, which provides an auxiliary signal and an improved electrometer to take full advantage of the extended range (1x 10-12 Torr). The gauge is available in two configurations: all metal gauge or glass enveloped. The unique features of this gauge also provide the benefits of electrical shielding, cooler running and improved stability at high pressures.       About the Company | ETI Gauges: Principles of Operation | Ionization Gauges | Special ETI Gauges | OEM and Custom Designs Configurations of Standard Gauges | Earlier Model Gauges | Replacement Filament Assemblies | ETI Custom Filaments | ETI Stems | | Contact ETI | Return Home | ©1999 ETI