HOT FILAMENT IONIZATION GAUGE
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BrandSylvania
ClassSpecial Purpose Electronic Tubes
BaseLong insulated leads or Jones plug
FilamentV @ mA
Construction
Primary TypeIonization Gauge
EnvelopePyrex Glass
Base MaterialGlass-to-metal seal / ground joint options
SectionsTriode (Filament, Grid, Collector)
Filament / Heater
MaterialHot filament
Absolute Maximum Ratings
Plate Voltage-25 V
Grid 2 Voltage150 V
Audio Performance
Key Features
- Highly sensitive
- Broad range
- Linear scalers
- Easily degassed sensing tubes
- Hard-glass envelope
- Crack-resistant glass-to-metal seal
Typical Operation
| Mode | Plate V | Gm (µmhos) | Rp (Ω) | µ | Plate mA |
|---|---|---|---|---|---|
| Ionization Gauge Operation | -25V | - | - | - | - |
Application Notes
The hot filament ionization gauge measures vacuum pressures below 1x10-3 mm mercury. Electrons accelerated toward the grid collide with gas molecules to produce ions collected on the negative collector. Sensitivity is linear and directly proportional to grid current.
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