KJLC® 351 Series Hot Cathode Bayard-Alpert Miniature-Ionization Vacuum Gauge

When used with KJLC's multigauge controllers, the KJLC351 ionization vacuum gauge module provides the basic signal conditioning required to turn the gauge into a complete measuring instrument.

KJLC continuously strives to enhance the design, reduce cost and improve the performance and reliability of the KJLC351. The electrometer circuit auto zeros to ensure that the readings are not subject to temperature drift, eliminating the need for unnecessary, expensive circuitry which further reduces the cost.

All operations including filament on/off, degas, and change of emission current is controlled from the MGC.

The emission current can be set to automatically switch between 4 mA and 100 µA. This results in optimal and stable pressure readings over the KJLC351's measurement range, 1.0 x 10^-9 to 5 x 10^-2 Torr

The KJLC351 gauge tube assembly is constructed of a compact all metal design with dual yttria coated Iridium or optional dual tungsten filaments.

For general vacuum applications, dual yttria coated filaments are offered for use with air and inert gases such as N2, argon, etc. Dual tungsten filaments are available for use with gases that may not be compatible with yttria coated filaments.

The gauge sensor assembly can be easily replaced in the field.

• Wide measurement range
  1.0 x 10^-9 to 5 x 10^-2 Torr
  1.3 x 10^-9 to 6.7 x 10^-2 mbar
  1.3 x 10^-7 to 6.7 Pa
• Ionization gauge designed specifically for use with KJLC's Multi-gauge Controller (MGC)
• Significant cost savings compared to other vacuum gauge measurement systems
• Full range measurement from 1 x 10^-9 Torr to atmosphere when used with the KJLC Multi-gauge Controller (MGC) and a convection gauge
• Dual hot filament design, rugged and compact metal construction
• Built-in Electrometer results in significant controller and cabling cost reduction
• Interconnect cable sold separately.

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 351, KJLC 275 Convection Enhanced Pirani (2x), interconnect cable, and power cable.
KJLC MGC 4000	Multi-gauge controller for up to 10 gauges simultaneously including convection gauges, ion gauges, and capacitance manometers.	MGC 4000, KJLC 351, KJLC 275 Convection Enhanced Pirani (2x), and interconnect cable. Power cable included.