274 Nude Bayard-Alpert Type Ionization Vacuum Sensors
Model: 274-nude-bayard-alpert-ionization-vacuum-gauge
274 Nude Bayard-Alpert Type Ionization Vacuum Sensors
Model: 274-nude-bayard-alpert-ionization-vacuum-gauge
Technical Specs
Sensor Type
Bayard-Alpert Type Ionization Vacuum Gauge
Collector
Tungsten, 0.005 or 0.010 diameter
Accuracy
±20%
Bake Out Temperature
450°C
Installation Orientation
Any
Envelope
Nude with 2 3/4 in. OD ConFlat flange
Cathode
Dual tungsten or dual thoria coated iridium on replaceable assembly or Thoria coated iridium on replaceable assembly
Grid
Refractory Metals
Length
4 1/8 in. (105 mm)
3 in. (76 mm) Insertion length
Sensitivity for N2
Electron Bombardment Degassable: 25/Torr
Resistance Heated Degassable: 10/Torr
Electron Bombardment Degas
40 watts max.
Resistance Heated Degas
100 watts max., 70 watts nominal
Cathode Heating Current
Electron Bombardment Degassable: 2.5 to 3.5 A
Resistance Heated Degassable: 4 to 6 A
Cathode Heating Voltage
3 to 5 V
Cathode Voltage Potential
+30 VDC
Collector Potential
0 V
Grid Potential
+180 VDC
Technical Specs
Sensor Type
Bayard-Alpert Type Ionization Vacuum Gauge
Collector
Tungsten, 0.005 or 0.010 diameter
Accuracy
±20%
Bake Out Temperature
450°C
Installation Orientation
Any
Envelope
Nude with 2 3/4 in. OD ConFlat flange
Cathode
Dual tungsten or dual thoria coated iridium on replaceable assembly or Thoria coated iridium on replaceable assembly
Grid
Refractory Metals
Length
4 1/8 in. (105 mm)
3 in. (76 mm) Insertion length
Sensitivity for N2
Electron Bombardment Degassable: 25/Torr
Resistance Heated Degassable: 10/Torr
Electron Bombardment Degas
40 watts max.
Resistance Heated Degas
100 watts max., 70 watts nominal
Cathode Heating Current
Electron Bombardment Degassable: 2.5 to 3.5 A
Resistance Heated Degassable: 4 to 6 A
Cathode Heating Voltage
3 to 5 V
Cathode Voltage Potential
+30 VDC
Collector Potential
0 V
Grid Potential
+180 VDC
