274 Nude Bayard-Alpert Type Ionization Vacuum Pressure Sensors
Overview
The Granville-Phillips® industry standard 274 Nude Bayard-Alpert Type Hot Cathode Ionization Vacuum Gauges provide good vacuum pressure measurement at an economical cost. 274 Nude Bayard-Alpert Type Hot Cathode Ionization Vacuum Gauges are available in two types: a single thoria-coated iridium filament gauge and a dual filament UHV gauge.
- Cage grid or non-sag bifilar grid
- Burn-out resistant filament or dual tungsten filaments
- Resistance heating or electron bombardment degas
- Replaceable filament
- Mates with standard electric connector
Products
| Compare | Description | Drawings, CAD & Specs | Availability | Price | |||
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274022 Vacuum Gauge, Nude Bayard-Alpert, Dual Tungsten Filament, 2.75 in. CF | $609 |
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274023 Vacuum Gauge, Nude Bayard-Alpert, Dual Thoria-coated Iridium Filament, 2.75 in. CF | $656 |
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274028 Vacuum Gauge, Nude Bayard-Alpert, Single Thoria-coated Iridium Filament, 2.75 in. CF | $609 |
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274041 Vacuum Gauge, Nude Bayard-Alpert, Dual Tungsten Filament, 2.75 in. CF, Pin Guard | $690 |
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274042 Vacuum Gauge, Nude Bayard-Alpert, Dual Thoria-coated Iridium Filament, 2.75 in. CF, Pin Guard |
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$725 |
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274043 Vacuum Gauge, Nude Bayard-Alpert, Single Thoria-coated Iridium Filament, 2.75 in. CF, Pin Guard |
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$690 |
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274050 Vacuum Gauge, Nude Bayard-Alpert, Dual Tungsten Filament, NW40 ISO-KF | $621 |
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274053 Vacuum Gauge, Nude Bayard-Alpert, Single Thoria-coated Iridium Filament, NW40 ISO-KF, Pin Guard | $708 |
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274057 Vacuum Gauge, Nude Bayard-Alpert, Dual Tungsten Filament, NW40 ISO-KF, Pin Guard | $708 |
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274058 Vacuum Gauge, Nude Bayard-Alpert, Dual Thoria-coated Iridium Filament, NW40 ISO-KF, Pin Guard | $737 |
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Specifications
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Sensor TypeBayard-Alpert Type Ionization Vacuum Gauge
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CollectorTungsten, 0.005 or 0.010 diameter
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Accuracy±20%
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Bake Out Temperature450°C
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Installation OrientationAny
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EnvelopeNude with 2 3/4 in. OD ConFlat flange
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CathodeDual tungsten or dual thoria coated iridium on replaceable assembly or Thoria coated iridium on replaceable assembly
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GridRefractory Metals
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Length4 1/8 in. (105 mm)
3 in. (76 mm) Insertion length
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Sensitivity for N2Electron Bombardment Degassable: 25/Torr
Resistance Heated Degassable: 10/Torr -
Electron Bombardment Degas40 watts max.
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Resistance Heated Degas100 watts max., 70 watts nominal
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Cathode Heating CurrentElectron Bombardment Degassable: 2.5 to 3.5 A
Resistance Heated Degassable: 4 to 6 A -
Cathode Heating Voltage3 to 5 V
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Cathode Voltage Potential+30 VDC
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Collector Potential0 V
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Grid Potential+180 VDC
Features
Resources
Literature
- Vacuum Measurement Product Guide (711.5 kB, PDF)
- 274 Bayard-Alpert Type Ionization Vacuum Gauges (310.5 kB, PDF)
Manuals
- 274 Bayard-Alpert Type Ionization Gauges (274026) (1.1 MB, PDF)
- 274 Gauge Radiation Baffle Installation (016117) (66.9 kB, PDF)
Ultra-High Velocity