MKS 274 Nude Bayard-Alpert Type Ionization Vacuum Pressure Sensors (NW40 ISO-KF; Single Thoria-coated Iridium)

Sensor Type: Bayard-Alpert Hot Cathode

Measurement Range: 3 x 10-11 to 1 x 10-3 Torr

Fitting Type: NW40 ISO-KF with Pin Guard

Filament: Single Thoria-coated Iridium

Collector: Tungsten, .005 in. diameter

Accuracy: ±20% (typical)

Bake Out Temperature: 450°C

Grid: Refractory Metals

Length: 4.125 in. (105 mm)

Sensitivity: 10/Torr

X-ray Limit: 4 x 10-10 Torr (approximate)

Filament Voltage Potential: +30 VDC

Collector Potential: 0 V

Grid Potential: +180 VDC

Filament Heating Current: 4 - 6 Amps

Filament Heating Voltage: 3 - 5 V

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