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September 2010



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Glass Ionization Gauge Tubes

Standard Ionization gauge tube
Features
  • Bayard-Alpert design
  • Easily outgassed grid
  • Ease of connection
  • Nonex, Pyrex, or Kovar tubulation
  • Thoria-coated iridium filament (burnout resistant) or dual tungsten filaments
  • Range: 10-3 to 10-10 Torr
  • High conductance 1.0" tubulation available
Specifications
Bayard-Alpert Ionization Gauge Tube Specifications
Vacuum range 9.9 x 10-3 to 3 x 10-10 Torr
Filament voltage 3-5 V
Filament bias 30 VDC
Filament current 4-6 A
Grid outgass 6.3-7.5 V at approx. 10 A
Collector voltage 0 VDC
Linearity 10-4 to 10-10 Torr at 10 mA emission
10-3 to 10-9 Torr at 1 mA emission


Ordering Information

Ion Gauge Tubes. -x refers to option suffixes below
Model No.DescriptionPrice
IG-1-N-x Nonex glass encapsulated tube terminated with 1" tubulation.*
Dual filament assembly and choice of filament material.		 Contact
IG-1-P-x Pyrex glass encapsulated tube terminated with 1" tubulation.*
Dual filament assembly and choice of filament material.		 Contact
* 0.75" tubulation available, no extra charge. Show /075 as suffix.


Options
Suffix Description Additional Price
-W Tungsten filamentsN/C
-I Thoria-coated iridium filaments N/C
-K Kovar weldable transition termination Contact
-CF 2.75" ConFlat flange termination Contact

To order: For example, to order a Pyrex encapsulated tube with thoria-iridium filaments and terminated with a ConFlat flange, one would write: IG-1-P-I-CF.


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