Granville-Phillips 340 Vacuum Gauge Controller (VGC) measures pressure from less than 1 x 10-9 Torr to atmosphere, utilizing an ionization gauge and two Convectron gauges.

Bayard-Alpert Design and Dual Tungsten or Burn-out Resistant Iridium

The Granville Philips Convectron Gauge tube used on the 5971 and 5972 mass spectrometers is available from S.I.S. This is a direct replacement for the HP original and screws into the fitting shown above.

A complete line of Brass and Stainless Steel Fittings for GC, MS and general laboratory use.