Granville Phillips 307 Dual Hot Cathode Ion Gauge Controller
These Granville Phillips (Model 307) ion gauge controllers can be ordered to operate dual hot cathode ion and dual convectron gauges. The hot cathode ion gauges measure high vacuum pressure from 10-3 to 10-9 Torr while the convectron sensors are typically used to measure roughing line vacuum pressure from atmosphere to 10-4 Torr. Please call to check availability and get pricing options for these refurbished Granville Phillips 307 ion gauge controllers. Cables and ion gauge tubes are available but sold separately.