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ID = 51033
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Ionisation or Vacuum Gauge 
Identical to CIG-22

Base Europe 4-Pin B4 (Eu A, E, 4A) 1914
Was used by Technology / Measurement
Filament --/--

Penning cold cathode ionisation vacuum gauge. This sensor, devised by Frans Michel Penning, can be used down to 10 exp-5 torr. It uses the conduction given by ionised gas particles accelerated under the influence of an electrostatic field. Typically the sensor operates at 2000V anode voltage in a magnetic field.

1 Mohms load

Dimensions (WHD)
incl. pins / tip
22 x 76 x mm / 0.87 x 2.99 x inch
Information source - - Manufacturers Literature   

Just Qvigstad
CIG-22: Manufacturer's Literature
Emilio Ciardiello

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