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ETI Hot Cathode:
8130 Nude

Physical Data

  • Connection: 2-3/4", 1" Conflat or KF 40 flange
  • Envelope: None
  • Mounting Position: Vertical
  • Collector: .005" Tungsten
  • Filament: Replaceable Thoria-coated Iridium or Dual Tungsten (8130)
  • Grid: Tantalum and Pr/Moly support squirrel cage

Operating Data

  • Sensitivity for N2: 25/Torr
  • X-ray Limit: 2 x 10-11 Torr
  • Operating Pressure: 2 x 10-11 to 1 x 10-3 Torr
  • Electron Bombardment Degas: 40 Watts @ 500 volts
  • Resistance Heated Degas: n/a
  • Bake-out Temperature: 450°C

The ETI Nude Ionization Gauge is a high-sensitivity gauge covering the vacuum range of 1 x 10-3 to 2 x 10-11 Torr (Argon). This tube features replaceable filaments, dual Tungsten or single iridium, and a small diameter-cage tantalum grid on platinum-clad, molybdenum support rods. A .005" - diameter collector is used. This results in a low X-ray limit, sensitive tube, capable of being baked out to 450°C for those applications requiring high-temperature processing.