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Nude Bayard-Alpert Ionization Vacuum Gauge, <3 x 10-11 - 1 x 10-3 Torr, Dual Thoria-coated Iridium Filaments, 2.75 in. CF, Pin Guard
The 274042 Nude Bayard-Alpert Hot Cathode Vacuum Gauge features dual thoria-coated iridium filaments for a <3 x 10-11 - 1 x 10-3 Torr vacuum measurement range, and has a 2.75 inch non-rotatable CF flange fitting with pin guard. Bayard-Alpert (hot cathode) gauges provide pressure measurement based on the ionization of gas molecules by a constant flow of electrons from a filament. The number of ions created is directly proportional to the density of molecules. The ions are collected and measured by a vacuum gauge controller and converted to pressure based on the sensitivity of the gauge. nude Bayard-Alpert hot cathode vacuum gauges are the best solution to severe ionization gauge pumping problems.
Specifications
- TypeVacuum Gauge
- Sensor TypeBayard-Alpert Hot Cathode
- Vacuum Pressure Range3.0 x 10-11 to 0.001 Torr
- Accuracy±20% (typical)
- OrientationAny
- Flange TypeCF with Pin Guard
- Flange Size2.75 in.
- CollectorTungsten, 0.005 in. diameter
- GridRefractory Metals
- Length4.125 in. (105 mm)
- Sensitivity25/Torr
- X-ray Limit2 x 10-11 Torr
- Electron Bombardment Degas40 Watts maximum
- Collector Potential0 V
- Grid Potential+180 VDC
- FilamentDual Thoria-coated Iridium
- Filament Heating Current2.5 - 3.5 Amps
- Filament Heating Voltage3 - 5 V
- Filament Voltage Potential+30 VDC
- Maximum Bakeout Temperature450°C