29D16 Penning Vacuum Gauge
              Jauge à vide de type Penning (à cathode froide)
              Penning-Vakuummeter (Kaltkathoden-Vakuummeter)
              AEI = Associated Electrical Industries, London, GB.
               Video on YouTube: Penning Ionization Gauge Working Principle Animation
 Video on YouTube: Penning Ionization Gauge Working Principle Animation
               
			  
			  Left: EDISWAN, H = 113 mm (4"1/2)     Ø = 28 mm (1"1/8)
              Right: AEI, H = 124 mm (4"7/8)     Ø = 28 mm (1"1/8)
			  
              
              
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