The structure of ZJ-2 is a typical dynatron type,adopting tungsten filament,using at the medium and high vacuum measurement system of vacuum degree.

    Parameter of ZJ-2
      Measuring range of vacuum degree:1.0×10-1-1×10-5(Pa)
      Filament voltage:3.5V
      Filament current:21.2A
      Filament voltage to ground:25V
      Grid electrode voltage to ground:200V
      Emission current:5mA
      Vacuum gauge constant:0.15±15%Pa-1
      Vacuum attended mode:φ15.5±0.5 DM-305 vacuum glass
      Baking temperature:80℃