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The hot filament ionization gauge, sometimes called a hot filament gauge or hot cathode gauge, is the most widely used vacuum (negative pressure) measuring device for the region from 10-3 to 10-10 torrs. It is a triode, where as the filament is the cathode. Note: Principles are mostly...
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Pressure measurement - Wikipedia, the free encyclopedia
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After manufacturing vacuum gauges for 10 years we have come up with three configurations of Ionization Gauge Controllers that have proven reliable and affordable.
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Cold Cathode gauges are accurate from 10−2 Torr to 10−9 Torr. Ionization gauge calibration is very sensitive to construction geometry, chemical composition of gases being measured, A hot cathode ionization gauge is mainly composed of three electrodes all acting as a triode, where the cathode is the filament.
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1 Hot Filament Ionization Gauge Tubes HISTORY Glass ion gauge tubes evolved from triode radio tubes. In early configurations, a filament was in the center with a grid surrounding the filament and a collector surrounding the grid.
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Models UHV-24 and UHV-24p Nude Bayard-Alpert Type Ionization Gauge Tubes The UHV-24p gauge has an even lower pressure limit, down to 5 × 10-12 torr (6.7 × 10-12 mbar). Because of its small diameter and closed structure, its ionization rate is at least twice that of other ionization gauges.
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Abstract. A new type of fast ionization gauge is described to measure neutral particle densities in the presence of a plasma in a magnetic field.
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Britannica online encyclopedia article on vacuum technology, Hot-filament ionization gauge.: The operating principles of this gauge are similar to the Penning gauge except that the electrons are produced by a hot filament and accelerated to a grid. The pressure range covered is either 1 to 10-5 torr or 10-2 to 10-7 torr,
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The electrons emitted by the heated filament of the Bayard Alpert (BA) Gauge produces ions of the gaseous species present in the vacuum system of which the gauge head forms the part. Overload : Gauge filament protection at pressure beyond 5x10-3 Torr and LED indication.
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New Televac All Metal Enclosed Mini B/A Type Ionization Gauges with Supported Dual Filaments are designed and engineered to provide highly accurate vacuum measurement, Special Dual Filament Design–greatly extends gauge life by allowing the user to switch to the remaining filament when the other one burns out...
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