The ETI 8140 Nude Ionization Gauge is a flange-mounted, Bayard-Alpert type for the range of 1 x 10^-3 to 4 x 10^-10 Torr. It is equipped with a bonded thoria, replaceable filament. The grid is of bi-filar construction. A .005" - diameter tungsten collector is provided for a low X-ray limit. The ETI 8140 is suited to either the I2R or the electron bombardment method of electrode degassing, making it compatible with either type of controller. This gauge may be baked to 450°C. This sensor can be controlled by a Televac MM200 gauge controller.

 

Specifications:

 

Connection: 2-3/4" Conflat or KF 40 flange

Envelope: None

Mounting Position: Vertical

Collector: .005" Tungsten

Filament: Replaceable Thoria-Coated Iridium or Dual Tungsten

Grid: Tungsten helix configuration

Sensitivity for N2: 10/Torr

X-ray Limit: 4 x 10^-10 Torr

Operating Pressure: 4 x 10^-10 to 1 x 10^-3 Torr

Electron Bombardment Degas: 70 Watts

Resistance Heated Degas: 6.3 to 7.5 volts @ 10 amps

Bake-out Temperature: 450° C