ULVAC Vietnam Representative Office

Hot Cathode Gauge GI Series

This series is hot cathode type ionization vacuum gauge, capable of measuring pressure in the 9.9 to 5 x 10-8 Pa (7.4 x 10-2 to 3.75 x10-10 Torr, 9.9 x 10-2 to 5 x 10-10 mbar)(Metal gauge, GI-M2), 6.7 x 10-1 to 10-6 Pa (5 x 10-3 to 9.75 x10-9 Torr, 6.7 x 10-3 to 1.3 x 10-8 mbar)(Glass gauge, GI-D7) range using triode tube or B-A type sensor heads


  • Can measure a wide pressure range from 9.9 to 5×10-8Pa (GI-M2)
    (7.4 x 10-2 to 3.75 x10-10 Torr, 9.9 x 10-2 to 5 x 10-10 mbar)
  • 2 types vacuum tube, metal and glass: Sensor head selected depending on the application (bare type also available)
  • Small-sized metallic sensor head prevents it from breaking (GI-M2)
  • Sensitivity setup can be changed for different gases. Allowing even more accurate pressure measurement.
  • Ideal for fixing the measurement range
  • 2 set points output
  • Switch 1/2 filament, sensitivity setting, range hold function, Degas function
  • RS232C communication


  • Vacuum heat treatment furnace
  • Vacuum brazing furnace
  • Vacuum evaporation system(diffusion pump type)
  • Process control for furnaces and other industrial equipment


Product nameMetal Ionization Vacuum GaugeGlass Ionization Vacuum Gauge
Modelmodel GI-M2model GI-D7
Measurable pressure range

5.00×10-8 to 9.99×100 Pa(3.75×10-10 to 7.49×10-2 Torr,5.00×10-10 to 9.99×10-2 mbar)

WIT:1.30×10-5 to 6.7×10-1 Pa

WIB:1.30×10-6 to 2.3×10-2 Pa

Pressure indicationDidital indication 2 digit mantissa, 1 digit exponent
Compatible sensor headM-11, M-12, M-13, M-14, M-15WIT-G1, WIT-G2, WIT-G3, WIB-G5, WIB-N3
Sampling time100ms
DEGASDirect electrical heating of grid AC power 1.5VA
FunctionsRange hold function, Gas sensitivity setting, Filament selection
Measurement value outputlinear output 0 to 10 VDC, Pseudo-logarithmic output 0-10VDC(1V linear signal in each digit), Log output
Control inputREMOTE/LOCAL, Filament ON/OFF, Filament 1/2, DEGAS ON/OFF, Range hold
Control outputAnalog output(0-10V), BCD output, Filament ON/OFF, Emission current setting, Degassing ON/OFF
Set point(contact point capacity)2 point(AC125Vmax, 0.5Amax / DC24Vmax, 1.0Amax)
Serial communication specRS232C
Operating temperature range10 to 40℃(50 to 104?)
Operating humidity range15 to 18%(not condensing)
Power supply voltageAC100±10V 50/60Hz, 60VAAC100±10V 50/60Hz, 120VA
FuseBS. SEMKO 3.15A (2pcs)
External dimensions W×D×H240mm×380mm×99mm
Standard accessoriesPower cord3P Plug with ground 
ConnectorFor external input / output 
Quick manual1 pc
OptionsSensor cable2, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60m4, 10, 15, 20, 25, 30m
Gauge headMetal Gauge:M-11, M-12, M-13, M-14, M-15

Triode type glass gauge:WIT-G1, WIT-G2, WIT-G3

B-A type glass gauge:WIB-G5

B-A tupe nude gauge:WIB-N3