Type 8142 is a versatile gauge constructed with a rugged bifilar grid and a thoriated iridium filament. The interior of the tube is platinum coated, shielding the gauge components from electrostatic and static charges that can occur in various operating conditions. This gauge contains a burnout-resistant thoriated iridium filament. It is also available in a rugged, long-life design described in the special gauge section.
|Tubulation||3/4”, 1” Pyrex® or Nonex® glass or 3/4”, 1” Kovar® flanges are available|
|Envelope||Nonex® 7720 glass|
|Filament||Thoria-coated iridium or tungsten|
|Grid||Tungsten helix configuration|
|Sensitivity for N2||10/Torr|
|X-ray Limit||2 × 10-10 Torr|
|Operating Pressure||2 × 10-10 to 1 × 10-3 Torr|
|Electron-Bombardment Degas||70 W|
|Resistance-Heated Degas||6.3 V to 7.5 V @ 10 A|
|Bakeout Temperature||250 °C|
Pyrex® is a registered trademark of Corning.
Nonex® is a registered trademark of Corning.
Kovar® is a registered trademark of Westinghouse Electric Corp.