CERBERUS GD-9 Schaltrelais für Feuermelderdetektoren
Switch relay for fire alarm detectors
Relais de commutation pour détecteurs d'incendie

This tube was used in the Cerberus F 5 fire detector launched in 1958.

The tube is so sensitive that even a static-charged pipe a few feet away will trigger it.

This tube was found in a lot of stuff from a LANL/SNL (Los Alamos National Laboratory/Sandia National Laboratory) surplus auction.

See Eduard Willi, Schweizer Elektronenröhren 1917-2003, Publikation im Eigenverlag, 2005, p. 94-96: Feuermelderdetektoren.

 

Hauteur • Height • Höhe : 44 mm • 1" 3/4
Diamètre • Diameter • Durchmesser : 18 mm • 3/4"

 

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