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

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...

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...