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KJLC® 971 Series

Note KJLC no longer offers the 971 cold cathode gauge. There are no direct replacements available but the KJLC Cold Cathode Pirani gauge could be considered as a possible alternative. Please contact the KJLC product team at with any additional questions.

Our cost effective cold cathode.


  • The cold cathode anode module design is user serviceable to decrease downtime and save external repair costs
  • Includes both analog and digital communication for ease of operation
  • Mountable in any orientation for ease of use and flexibility of design
  • Alternate analog output and electrical connectors available to match other vendors' vacuum gauges and facilitate an easy upgrade
  • Can be used with the PDR900 Vacuum Gauge Controller and Display for Series 900 Transducers for easy set up
  • RoHS and CE Compliant


  • * 120 VAC model includes US Mains Power Cable.
  • * 220 VAC model includes both UK and EU Mains Cables.

Specifications Table

Measurement Range1x10-8 Torr to 5x10-3 Torr
Communications InterfaceRS-485 or RS-232
Power Requirements9-30VDC, 2W
Temperature (operating)0° to 40°C (32° to 104°F)
Temperature (bakeout)85°C (185°F), non-operating
Max. Pressure1500 Torr
Materials Exposed to Vacuum304 and 403 stainless steel, Viton® epoxy resin, ceramic
Accuracy (typical)5x10-8 Torr to 10-3 ± 30 % of reading
Repeatability (Typical)5x10-8 Torr to 10-3 ± 30 % of reading
Mounting/Installation OrientationAny
Calibration GasNitrogen
Analog Outputs0.5 VDC/decade
Internal Volume21 cm3
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