Vacuum Transducer (Pirani-Cold Cathode)

Product Announcement from Thyracont Vacuum Instruments GmbH

Vacuum Transducer (Pirani-Cold Cathode)-Image

The compact VSM72 Pirani/cold cathode combination transducer measures absolute pressure from 1000 mbar to 5 x 10-9 mbar (750 Torr to 5 x 10-9 Torr).
The intelligent, micro processor driven Smartline vacuum transducers automatically control the appropriate interaction of both vacuum sensors regarding measurement ranges and switching points to achieve high accuracy.


  • Combination sensor with wide measuring range
  • Patented pulsed Pirani sensor with extended range allows operation of the cold cathode at lower pressure and increase of lifetime
  • Robust cold cathode sensor, insensitive against inrush of air
  • Logarithmic signal output 0 - 10 V and RS485 interface
  • Replaceable sensor head
  • Excellent ignition behavior
  • Correct pressure readings by means of separate gas type correction factors for Pirani and cold cathode sensors
  • Two independent, dry relay switch points

Typical Applications

  • Analysis instruments
  • Coating plants and vapor deposition
  • Mass spectrometry
  • Process engineering
  • Sputtering plants
  • Vacuum furnaces