Replacement Ion (Hot Filament) Gauge Tubes

Bayard-Alpert (B-A) ion gauges have a reasonably linear response from 1 x 10^-4 to 1 x 10^-9 Torr (1 X 10 ^-4 torr to 5 X 10^-12 torr for nude UHV gauges) with gauge sensitivities from 5 to 20 Torr-1. B-A ion gauges are available with one or two filaments, where the second filament would act as a spare). The filaments are available in two materials. The first material, a thoria-coated iridium, is used in oxygen-rich applications and is resistant to "burn-out" if exposed to atmosphere. This material is not intended for applications that will expose the filament to chemicals. The second material, tungsten, is a lower cost material that is resistant to chemical exposure, including halogen-based chemicals, but will "burn-out" if exposed to atmosphere.

Dimensional Drawings

Pinouts

Legend:

G = Grid
F₁, F₂ = Filament
F_C = Filament Common
C = Ion Collector

Filaments Comparison:

A Complete Package Consists of

Note: Below you will find common methods to control your gauge / transducer. Please note that not all controllers are listed for every gauge / transducer. If you do not see the controller that you need, please contact your local KJLC Sales Representative.

This unit can be:

• Powered via a controller. Suggested Controllers:
  • KJLC MGC 3000
  • KJLC MGC 4000

Compatible Controller	Description	Components Needed	Schematic Download
KJLC MGC 3000	Mutli-gauge controller for 2 convection gauges and 1 ion gauge (glass, nude, or nude UHV), 6 set-point relays, and RS232/RS485 communication.	MGC 3000, KJLC Ion Gauge (controller specific), KJLC 275 Convection Enhanced Pirani (2x), interconnect cable, and power cable.	MGC-3300 MGC-3400
KJLC MGC 4000	Multi-gauge controller for up to 10 gauges simultaneously including convection gauges, ion gauges, and capacitance manometers.	MGC 4000, KJLC Ion Gauge, KJLC 275 Convection Enhanced Pirani (2x), and interconnect cable. Power cable included.