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Stanford Research Systems
BA GaugesBayard-Alpert Ionization Gauges

BA GaugesBayard-Alpert Ionization Gauges

Product catalog summary

Overview
Stanford Research Systems provides a range of Bayard-Alpert Ionization Gauges, including glass tubulated, nude, and nude-UHV types, designed for use with the IGC100 Ion Gauge Controller. These gauges are used for measuring vacuum pressure and are available with different filament types and configurations.

Gauge Selection Process
1. Select the gauge type: glass-tubulated, nude, or nude-UHV.
2. Choose the filament type: ThO2/Ir or tungsten, single or dual.
3. Note the SRS part number and select the appropriate cable using the pin connector diagram.

Gauge Types and Features

Glass-Tubulated Gauges: Available with single ThO2/Ir or dual tungsten filaments. They feature a 2.75" CF flange and a 1" diameter side tube.
Nude Gauges: Feature a bi-filar helical anode grid and are available with single ThO2/Ir filaments.
Nude-UHV Gauges: Feature a closed-end anode grid cage and are available with dual ThO2/Ir or tungsten filaments.

Specifications

Physical: All gauges have a 2.75" CF flange connection. The glass-tubulated gauge uses Nonex 7720 glass, while nude and nude-UHV gauges are metal.
Operating Pressure: Ranges from 2 × 10^–10 to 1 × 10^–3 Torr for glass-tubulated, 4 × 10^–10 to 1 × 10^–3 Torr for nude, and 2 × 10^–11 to 1 × 10^–3 Torr for nude-UHV.
Sensitivity: 10/Torr for glass-tubulated and nude, 25/Torr for nude-UHV.
Degas Power: 70 W nominal for glass-tubulated and nude, 40 W max for nude-UHV.
Bakeout Temperature: 250 °C for glass-tubulated, 450 °C for nude and nude-UHV.

Electrical Specifications

Anode grid bias voltage: 180 VDC
Collector bias voltage: 0 VDC
Filament bias voltage: 30 VDC
Filament supply current: 4 to 6 A
Filament supply voltage: 3 to 5 VDC

Ordering Information

GR-100F: Single ThO2/Ir, $400
GW-100F: Dual tungsten, $400
NR-F: Nude, single ThO2/Ir, $540
NR-F-UHV: Nude, dual ThO2/Ir, $550
NW-F-UHV: Nude, dual tungsten, $570

Catalog excerpts

BA GaugesBayard-Alpert Ionization Gauges-1

Bayard-Alpert Ionization Gauges SRS nude and glass tubulated ionization gauges Nude-UHV Gauge Glass Tubulated Gauge Nude Gauge SRS Ion Gauges To select the appropriate gauge, follow the steps below using the Model Numbers / Selection & Cross-Reference Table (next page). 1) Select the type of gauge: glasstubulated, nude or nude-UHV SRS offers three types of gauges for the IGC100 Ion Gauge Controller: glass tubulated, nude, and nude-UHV Bayard-Alpert ionization gauges. We also supply convectionenhanced Pirani gauges. Single and Dual Filaments All single, hair-pin shaped filaments used in SRS gauges are spring tensioned to eliminate filament sag. This allows the user to mount the gauge in any orientation. Dual-filament assemblies provide security against filament burnout. 2) Select filament type: ThO2/Ir or tungsten, single or dual 3) Note the SRS part number Once you have selected a gauge, choose the appropriate cable using the pin connector diagram. Stanford Research Systems

Open the catalog to page 1

BA GaugesBayard-Alpert Ionization Gauges-2

Bayard-Alpert Gauge Pin Connector Configuration Filament Collector Grid Figure 3. Nude Gauge Single ThO2/Ir Filament Bi-Filar Helical Anode Grid IGC100 Cable: O100C3 Figure 2. Glass-Tubulated Gauge Dual-Tungsten Filaments IGC100 Cable: O100C2 Figure 1. Glass-Tubulated Gauge Single ThO2/Ir Filament IGC100 Cable: O100C1 Bayard-Alpert Gauge Pin Connector Configuration Bayard-Alpert Gauge Specifications Grid Single ThO2/Ir Filament IGC100 Cable: O100C1 Collector Grid Figure 1. Glass-Tubulated Gauge Single ThO2/Ir Filament IGC100 Cable: O100C1 Filament 2 Figure 2. Glass-Tubulated Gauge Dual-Tungsten...

Open the catalog to page 2

BA GaugesBayard-Alpert Ionization Gauges-3

Bayard-Alpert Gauge Specifications Glass-Tubulated Nude Nude-UHV Physical Connection Side tube or 2.75" CF flange 2.75" CF flange 2.75" CF flange Side tube diameter 1" N/A N/A Envelope Nonex 7720 glass, Nude Nude 2.25" dia. × 5.25" long Mounting position Any, vertical preferred [1] Any Any Collector Tungsten, 0.05" dia. Tungsten, 0.05" dia. Tungsten, 0.05" dia. Filament Single ThO2/Ir [2] or Single ThO2/Ir [2], Dual ThO2/Ir or dual tungsten dual tungsten replaceable Grid Tungsten, bi-filar Tungsten, bi-filar Tantalum and Pt/Moly support, helix configuration helix configuration closed-end “squirrel”cage...

Open the catalog to page 3

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

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