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FILAMENTS

MDC nude ionization gauge tubes are designed for high and ultrahigh vacuum measurements between 1x10-3 to 2x10-11 mbar. Like their glass enclosed counterparts, these are also hot cathode ionization types. The main difference being their method of construction.

Nude gauges allow for easy replacement of perishable filaments and the added durability of ceramicto-metal electrical feedthrough insulation which makes them bakeable to 450°C. Two nude gauge styles are offered, these utilize resistive heating or electron bombardment degas.

Features
  • High temperature
  • UHV compatible
  • Replacement filament assemblies for above ionization gauge tubes

Nude ionization gauge tubes -Filaments


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Vacuum Specifications
 Vacuum range 10 3 to 4xl0 ' 0 mbar
 Maximum operating pressure   lxi0- 3 mbar
 Sensitivity ±20% 10 mbar
 X-ray limit 4x I 0-' 0 m bar
Construction Specifications
 Flange  304ss
 Grid Tungsten
 Filament Dual: Tungsten or iridium
 Collector Tungsten
 Shield Coating  Platinum
 Base Leads  Soft nickel I .Smm dia
 Collector Lead  Soft nickel I .Omm dia
Operating Specifications
 Collector -30V DC
 Grid  +ISOV DC
 Filament +30V DC
 Filament Voltage 3- sv
 Filament Current  4 - 6A
 Degas by I'R 70W
 Emission  IOmA
 Max. Bakeout Temperature 450°C
For conversion tables click here

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