Exposition

Vacuum Feedthroughs

Exhibit no. 280

The operation of a vacuum instrument, such as a mass spectrometer often requires the transmission of electrical currents, voltages or signals across the walls of vacuum chambers. This is possible with electrical feedthroughs. 
 

They often consist of ceramic-to-metal assemblies, where the ceramic serves as an electrical insulator between the conductor and the connection flange. In addition to providing leak-tightness in high and ultra-high vacuum, some feedthroughs are resistant to high temperatures used during bake-out cleaning.

The exhibit is a set of electric feedthroughs for 20mm gold seal inlet ports used in the sector mass spectrometer ZAB-EQ produced by VG Analytical LTD. in 1986.

Wikipedia: Feedthrough 

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