8130 Nude Bayard Alpert Ion Gauge - Hot Cathode

The ETI 8140 series of Bayard Alpert ion gauges (also called a vacuum gauge, vacuum transducer, or hot cathode) feature a burnout-resistant iridium coated filament or two tungsten filaments for vacuum measurement. This vacuum gauge has a wide measurement range of 10-10 to 10-3 Torr and can be outgassed for extended life of the vacuum gauge and cleaning of hot cathode contamination. The dual filament vacuum gauge design allows you to use the second filament when the first filament burns out or becomes heavily contaminated in this vacuum transducer.

Looking for a cleanable, longer lasting solution? We suggest looking at our cold cathode technology, such as the 7FCS cold cathode vacuum gauge. This is a different vacuum gauge technology for ion gauge pressure measurement using a cold cathode vacuum transducer (instead of a hot cathode) which is less susceptible to contamination and is more easily cleaned when the vacuum gauge does become contaminated.


The Televac 8140 Series Bayard Alpert Ion Gauge – Hot Cathode – Features

  • Low cost vacuum gauge
  • Outgassing and dual filaments for extended vacuum gauge lifetime
  • Reliable hot cathode technology
  • Contamination resistant vacuum transducer and resistant to inrushes of gas
  • Excellent customer support for vacuum transducers
Connection2-3/4″ conflat or KF 40 flange
Mounting PositionVertical
Collector.005” tungsten
FilamentReplaceable thoria-coated iridium or dual tungsten
GridTungsten helix configuration
Sensitivity for N210/Torr
X-ray Limit4*10-19 Torr
Operating Pressure4*10-10 to 1*10-3 Torr
Electron-Bombardment Degas70 W
Resistance-Heated Degas6.3 V to 7.5 V @ 10 A
Bakeout Temperature450 °C