Myers-Vacuum GPH-001A



This rugged high vacuum gauge tube is ideal for heavy industrial applications such as vacuum furnaces and evaporators. There is no hot filament to accidentally burnout. If the tube is turned on at atmosphere it may require simple disassembly and cleaning. The replaceable anode attaches to a replaceable vacuum feedthru. The arc gap is adjustable. 
The Penning vacuum tube (named after its inventor, F. M. Penning) measures pressure as a function of the ion current flowing in a cold cathode pressure sensing tube which operates at high voltage and in a magnetic field. These tubes work with Myers Vacuum and CVC type: GPH-320, GPH-324 and GPT-450 vacuum gauges.


  • Pressure range from 2.5 X 10-2 to 2 x 10-8 Torr 
  • Can be turned on at atmosphere with minimal damage 
  • Easy to disassemble and clean. No special tools are required. 
  • Removable anode for cleaning and replacement. 
  • Stainless steel envelope. 
  • Quick, stable starting characteristics. 
  • Permanent ring magnet. 
  • Viton seal gaskets. 
  • Large mouth opening for quick pump out. 
  • Pressure is factorable to other gases. 
  • Standard BNC connection 
  • Bakeable to 150ÂșC 
  • Tube can be mounted in any orientation, best results come from minimizing contamination.
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    Myers Vacuum has been servicing systems worldwide since 1986, specializing in support of customized vacuum chambers for sputtering systems, metal evaporation,...

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