Compare Model Drawings, CAD & Specs Fitting Type Port Size Filament Availability Price
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 0.75 in. Glass Inlet Port
$155
Pyrex glass inlet port 0.75 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 0.75 in. Metal Inlet Port
$170
Kovar Metal Inlet Port 0.75 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 1.0 in. Glass Inlet Port
$165
Pyrex glass inlet port 1.0 in. Single Thoria-coated Iridium
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 1.0 in. Metal Inlet Port
$260
Kovar metal inlet port 1.0 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 2.75 in. CF, 0.75 in. Port
$265
2.75 in. CF Flange 0.75 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 2.75 in. CF, 1.0 in. Port
$265
2.75 in. CF Flange 1.0 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 0.75 in. Glass Inlet Port
$140
Pyrex glass inlet port 0.75 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 0.75 in. Metal Inlet Port
$160
Kovar metal inlet port 0.75 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 1.0 in. Glass Inlet Port
$155
Pyrex glass inlet port 1.0 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 1.0 in. Metal Inlet Port
$170
Kovar metal inlet port 1.0 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 2.75 in. CF, 0.75 in. Port
$240
2.75 in. CF Flange 0.75 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 2.75 in. CF, 1.0 in. Port
$245
2.75 in. CF Flange 1.0 in. Dual Tungsten
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 1.33 in. CF, 0.75 in. Port
$240
1.33 in. CF Flange 0.75 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 1.33 in. CF, 0.75 in. Port
$225
1.33 in. CF Flange 0.75 in. Dual Tungsten
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, NW25 ISO-KF, 1.0 in. Port
$300
NW25 ISO-KF 1.0 in. Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Single Thoria-coated Iridium Filament, 15 mm Glass Inlet Port
$180
Pyrex glass inlet port 15 mm Single Thoria-coated Iridium
274 glass tubulated bayard-alpert ionization vacuum sensor
Vacuum Gauge, Glass Bayard-Alpert, Dual Tungsten Filament, 15 mm Glass Inlet Port
$165
Pyrex glass inlet port 15 mm Dual Tungsten

Specifications

  • Type
    Vacuum Pressure Sensor
  • Sensor Type
    Bayard-Alpert Type Ionization Gauge
  • Measurement Range
    <1.0 x 10-9 to 0.001 Torr
  • Collector
    Tungsten, .010 in. diameter
  • Accuracy
    ±20%
  • Bake Out Temperature
    450°C
  • Installation Orientation
    Any, Vertical preferred
  • Tubulation
    19 or 25 mm diameter x 57 mm, Kovar, Pyrex, or flanged
  • Envelope
    Nonex 7720 glass, 2 1/4 in. (57 mm) dia. x 5in. (127 mm) long
  • Cathode
    Dual tungsten or one thoria coated iridium
  • Grid
    Refractory Metals
  • Length
    6 in. (152 mm)
  • Sensitivity for N2
    10/Torr
  • X-ray Limit
    About 3 x 10-10 Torr
  • Electron Bombardment Degas
    100 watts max.
  • Resistance Heated Degas
    6.3 to 7.5 VAC at 10 A
  • Cathode Heating Current
    4 to 6 A
  • Cathode Heating Voltage
    3 to 5 V
  • Cathode Voltage Potential
    +30 VDC
  • Collector Potential
    0 V
  • Grid Potential
    +180 VDC

Features

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