An apparatus for measuring and regulating the variable pressure furnace gas chemistry is described. The apparatus uses a mass spectrometer for measurements, in the preferred form of the invention, in which gas species percent composition is obtained quantitatively independent of total furnace pressure...http://www.google.es/patents/US4781358?utm_source=gb-gplus-sharePatente US4781358 - Apparatus for monitoring an article in sintering furnace
Apparatus for monitoring an article in sintering furnace
