VACUUM GAUGE Russian patent published in 2001 - IPC

FIELD: measurement technology, means measuring low vacuum. SUBSTANCE: vacuum gauge has flat metal electrodes placed in parallel in insulators. Inner surface of one electrode is coated with metal layer carrying radioactive substance and electrometer. Dielectric gasket is mounted for formation of closed chamber and is positioned between electrodes. Second electrode is provided with hole and is located on axis. This electrode and metal layer containing radioactive substance are made of metals having different chemical composition. Second electrode is made of metal whose performance of electron output differs from that of electrons of metal layer with radioactive substance. Thickness of dielectric gasket is less than path of charged particles of radioactive substance of metal layer. EFFECT: simplified structure of vacuum gauge having small volume of chamber and emitting generating signal. 2 cl, 1 dwg