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- https://en.wikipedia.org/wiki/Residual_gas_analyzer
- https://en.wikipedia.org/wiki/Quadrupole_mass_analyzer
- https://www.americaninstrument.com/pdf/2647-GC.pdf Pfeiffer Omnistar GSD 301 T Manual
- http://nanotraps.mbi-berlin.de/public/Bedienungsanleitungen-Manuals/massenspectrometer/0bg5201bd.pdf Pfeiffer Prisma QMS 200 (in German Unfortunately)
- https://www.idealvac.com/files/brochures/Pfeiffer_PKR_251_Pirani_ColdCathode.pdf Pfeiffer PKR 251
- https://manualzz.com/doc/30114534/quadstar-32-bit Manual for the Analysis and control software for the unit