hot-filament ionization gage

hot-filament ionization gage

[′hät ¦fil·ə·mənt ‚ī·ə·nə′zā·shən ‚gāj]
(electronics)
An ionization gage in which electrons emitted by an incandescent filament, and attracted toward a positively charged grid electrode, collide with gas molecules to produce ions which are then attracted to a negatively charged electrode; the ion current is a measure of the number of gas molecules.
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