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KJLC® 317 Series Pirani Gauges & 947 Controller

Note The 317 gauge head and 947 controller are no longer offered. Please consider the 375/275 combo as a possible alternative and feel free to contact the KJLC product team at gauging@lesker.com with any additional questions.

Ideal for rough to medium vacuum applications, including measurement of roughing and foreline pressures, activation of high vacuum sensors, or startup of a system process with the standard relay set points.


  • Convection-enhanced Pirani vacuum gauge controller
  • Digital LED display for clear, unmistakable readings
  • Wide measurement range of 10-3 to 10+3
  • Rapid responsiveness for critical applications
  • Two independent relay set-points for process control
  • Gas-type sensitivity ideal for leak detection
  • Multiple pressure unit versions available
  • CE marked


  • Zero adjust
  • Atmospheric adjust
  • Set-point functions


  • Semiconductor
  • Food processing
  • Analytical applications
  • R & D
  • Other industrial vacuum applications

Specifications Table

Measurement MethodPirani
Measurement Range1 x 10-3 to 1,000 Torr (1 to 1,333 mbar)
Communications InterfaceDigital RS-485, 9-pin, Sub-D-socket
Accuracy (% of measurement)±<1% of Decade
Temperature (operating)0-50° C
Temperature (bakeout)100° C for Shielded model (gauge tube only)
Materials Exposed to VacuumStainless steel, nickel, glass, platinum
Repeatability (Typical)5% of indicated pressure
Mounting/Installation OrientationHorizontal
Calibration GasAir/Nitrogen

Product Manual
For a download of the product manual, click here.
Contact Us
To speak with someone directly, please call 1-412-387-9200 or email international@lesker.com.