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10G18

Glass-envelope Bayard-Alpert ionization gauge head designed for ultra-high-vacuum pressure measurement.

Directly heatedCold cathodeCommon cathodeDissimilarSpecialized

Sections: 1
Base: -
Socket code: -
Base pins: -
Nominal heater: -

Description

Bayard-Alpert ultra-high-vacuum ionization gauge head with glass envelope. Published ratings, characteristics, operating data, capacitances, microwave/noise data, or gauge-head data were retained according to the physical device and mapped only to compatible locked-schema fields.

General specifications

Tube and section characteristics

Properties common to every published source and operating point.

Heater and base

Base: -
Socket code: -
Base pins: -
Nominal heater voltage: -
Nominal heater current: -
Parallel heater voltage: -
Parallel heater current: -
Series capable: No

Terminal pinout

Electrical assignments shared by every tube using this base designation.

No verified pinout is recorded for this base designation.

Section ratings

1 physical section, each with unique specifications.

Section 1

Gauge

X-ray radiationInterelectrode capacitances

No fixed ratings are recorded for this section.

Bayard-Alpert ionization-gauge section; gauge-specific pressure, sensitivity, emission and insulation data retained as parameters.

Source-dependent data

Operating conditions by source

Each block preserves the test conditions and published values from one reference. Values from different sources are intentionally kept separate.

Data set 01

1999 Philips E-Z

Published operating points and test conditions from this source.

SECTION 1

Gauge

Characteristics

Pressure range
4e-11 to 0.001 torr
Sensitivity for nitrogen
12 per torr
Emission current minimum
1 uA
Collector insulation resistance minimum
100000000000000 ohm
Grid insulation resistance minimum
1000000000000 ohm

Other

Emission current maximum
50 mA
Maximum filament voltage
8 V
Maximum bake-out temperature
450 degC
Maximum grid input power
30 W

Construction

Filament material
Tungsten