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 zeroes 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 stabile 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.
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
|Accuracy - N2 (Typical)||1.0 x 10-8 to 5 x 10-2 Torr; ±15% of reading|
|Repeatability - (Typical)||±5% of reading|
|Materials Exposed To Gases||
Dual Filaments: yttria coated iridium or optional tungsten
Ion collector: tungsten
Others: 316/304 SS, glass, nickel
|Sensitivity||Factory pre-set. Also user adjustable from 2 to 99 (set by the KJLC Multi-gauge Controller (MGC))|
|X-Ray Limit||< 5 x 10-10 Torr, < 6.7 x 10-10 mbar, < 6.7 x 10-8 Pa|
|Emission Current||100 µA, 4 mA, or automatic switching between 100 µA and 4 mA|
|Degas||3 W, electron bombardment|
Gauge is auto turned off at factory default setting of 5 x 10-2 Torr
The MGC can also be set up to auto filament turn on/off using a convection gauge
|Filament Status||Filament on/off status is determined by LED on the KJLC351 and also displays messages and available user interface options on the MGC|
|Internal Gauge Volume||1.0 in3 (16.4 cm3)|
|Temperature||Operating: 0 to + 40°C; Storage: -40 to + 70°C|
|Bakeout Temperature||200°C (sensor only - electronics removed)|
|Humidity||0 to 95% relative humidity, non-condensing|
|Weight||0.6 lb. (0.27 kg) with NW25 KF flange|
|Housing (Electronics)||Aluminum extrusion|
|Setpoint Relay||Relays available from MGC|
|Input Signal||All KJLC351 operations controlled from the MGC|
|Filament Selection||User selectable between filament 1 and 2 - command signal sent from the MGC|
|Input Power||Powered by MGC|
|Connector/Cabling||KJLC cable/connector assembly for connection to MGC|
|Compliance & Standards||CE compliant, RoHS compliant|
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