Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 0.75 in. Metal Inlet Port

Technical Specs

  • Type
    Vacuum Gauge
  • Sensor Type
    Bayard-Alpert Hot Cathode
  • Measurement Range
    1.0 x 10-9 to 0.001 Torr
  • Fitting Type
    Kovar Metal Inlet Port
  • Port Size
    0.75 in.
  • Filament
    Single Thoria-coated Iridium
  • Collector
    Tungsten, .010 in. diameter
  • Accuracy
    ±20% (typical)
  • Bake Out Temperature
    450°C
  • Installation Orientation
    Any, Vertical preferred
  • Envelope
    Nonex 7720 glass, 2.25 in. (57 mm) OD, 5 in. (127 mm) long
  • Grid
    Refractory Metals
  • Length
    6 in. (152 mm)
  • Sensitivity
    10/Torr
  • X-ray Limit
    3 x 10-10 Torr (approximate)
  • Electron Bombardment Degas
    100 Watts maximum
  • Resistance Heated Degas
    6.3 to 7.5 VAC at 10 Amps (l2R)
  • Filament Voltage Potential
    +30 VDC
  • Collector Potential
    0 V
  • Grid Potential
    +180 VDC
  • Filament Heating Current
    4 - 6 Amps
  • Filament Heating Voltage
    3 - 5 V

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