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Bayard-Alpert Ionization Gauges
SRS nude and glass tubulated ionization gauges
Nude-UHV Gauge Glass Tubulated Gauge Nude Gauge
SRS Ion Gauges
SRS offers three types of gauges for the IGC100 Ion
To select the appropriate gauge, Gauge Controller: glass tubulated, nude, and nude-UHV
follow the steps below using the Model Bayard-Alpert ionization gauges. We also supply convection-
Numbers / Selection & enhanced Pirani gauges.
Cross-Reference Table (next page). Single and Dual Filaments
All single, hair-pin shaped filaments used in SRS gauges are
1) Select the type of gauge: glass- spring tensioned to eliminate filament sag. This allows the
tubulated, nude or nude-UHV 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 phone: (408)744-9040
www.thinkSRS.com
Bayard-Alpert Gauge Single ThO2/Ir Filament IGC100 Cable: O100C2
Pin Connector Configuration IGC100 Cable: O100C1
Collector
Filament 2
Filament Grid Grid Grid
Bayard-Alpert Gauge Specifications
N/C
Grid Grid Filament
Filament 1
Figure 3.
Figure 1. Figure 2. Nude Gauge
Glass-Tubulated Gauge Glass-Tubulated Gauge Single ThO2/Ir Filament
Bayard-Alpert Gauge Single ThO2/Ir Filament Dual-Tungsten Filaments Bi-Filar Helical Anode Grid
Pin Connector Configuration IGC100 Cable: O100C1 IGC100 Cable: O100C2 IGC100 Cable: O100C3
Filament 2
Filament Grid Grid Collector Collector
Grid Grid
N/C
Grid Grid
Filament 1
Filament Filament 1 Filament 2
Figure 1. Figure 2. Figure 3. Figure 4.
Glass-Tubulated Gauge Glass-Tubulated Gauge Nude Gauge Nude Gauge
Single ThO2/Ir Filament Dual-Tungsten Filaments Single ThO2/Ir Filament Dual ThO2/Ir or W Filament
IGC100 Cable: O100C1 IGC100 Cable: O100C2 Bi-Filar Helical Anode Grid Closed-End Anode Grid Cage
IGC100 Cable: O100C3 IGC100 Cable: O100C3
Filament 2
Grid Grid Collector
Grid Collector
Grid
N/C
Filament 1
Filament
Figure 2. Figure 3. Filament 1 Filament 2
Glass-Tubulated Gauge Nude Gauge Figure 4.
Dual-Tungsten Filaments Single ThO2/Ir Filament Nude Gauge
Bayard-Alpert Gauge Model Numbers / Selection and Cross-Reference Table
IGC100 Cable: O100C2 Bi-Filar Helical Anode Grid
IGC100 Cable: O100C3
Dual ThO2/Ir or W Filament
Closed-End Anode Grid Cage
IGC100 Cable: O100C3
Collector
Type Filament Connection Pin SRS part # Helix ETI Duniway Kurt J. Varian
Grid Collector
config. Lesker
Grid
N/C
Glass-tubulated ThO2/Ir 2.75" CF Fig. 1 GR-100F 274008 4336F/1 I-CFF-275 G100F K2471303
(single)
Filament (1" dia. side tube)
Figure 3. Filament 1 Filament 2
Glass-tubulated tungsten
Nude Gauge 2.75" CF Figure 4. Fig. 2 GW-100F 274018 4336TF/1 T-CFF-275 G100TF K7360307
Single ThO2/Ir Filament
(dual)
Bi-Filar Helical Anode Grid (1" Nude Gauge
dia. side tube)
Dual ThO2/Ir or W Filament
IGC100 Cable: O100C3
Closed-End Anode Grid Cage
Nude ThO2/Ir 2.75" CF
IGC100 Cable: O100C3 3
Fig. NR-F 274028 8140 I-NUDE-BAC G8140 L5150-302
(single) (bi-filar helix)
Collector
Nude UHV ThO2/Ir
Grid 2.75" CF Fig. 4 NR-F-UHV 274023 8130 I-NUDE-F G8130 971-5007
(dual) (closed-end cage)
Nude
Filament 1 UHV tungsten
Filament 2
2.75" CF Fig. 4 NW-F-UHV 274022 8130T T-NUDE-F G8130T 971-5008
Figure 4. (dual) (closed-end cage)
Nude Gauge
Dual ThO2/Ir or W Filament
Closed-End Anode Grid Cage
IGC100 Cable: O100C3
Stanford Research Systems phone: (408)744-9040
www.thinkSRS.com
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. ◦ Jabse Service Manual Search 2024 ◦ Jabse Pravopis ◦ onTap.bg ◦ Other service manual resources online : Fixya ◦ eServiceinfo