Ionization gauge and method of using and calibrating same

Ionization gauge having a non-time varying magnetic field genera

Ionization vacuum gauge

Ionization vacuum gauge

Ionization vacuum gauge

Ionization vacuum gauge

Ionization vacuum gauge using a cold micropoint cathode

Ionization vacuum pressure gauge

Louvered beam stop for lowering x-ray limit of a total...

Method and apparatus for maintaining emission capabilities...

Method and apparatus for maintaining emission capabilities...

Method and apparatus for monitoring vacuum degree of vacuum...

Method and apparatus for shielding feedthrough pin...

Method and apparatus for shielding feedthrough pin...

Method and circuit for extending the range of a cold cathode dis

Method and means for vacuum gauging

Molecular shield for an ionizaton vacuum gauge

Multipactor pressure gauge for use as a noninvasive vacuum tube

Penning type gauge head with ignition aid

Penning vacuum meter