This Agilent Varian Hot Cathode Ion Gauge is a Pirani and Bayard Alpert combination gauge with LED Display. It contains a long life yttrium oxide coated iridium Single Filament and can measure pressure from 3.8 X 10-10 Torr to atmosphere. Over the whole measuring range, the gauge has a continuous
characteristic curve and its measuring signal is output as logarithm
of the pressure.
The gauge functions with a Bayard-Alpert hot cathode ionization
measurement system (for < 2.0×10-2 Torr) and a Pirani measurement
system (for >5.5×10-3 Torr). In the overlapping pressure
range of 2.0×10-2 to 5.5×10-3 Torr, a mixed signal of the
two measurement systems is output. The hot cathode is
switched on by the Pirani measurement system only below the
switching threshold of 2.4×10-2 Torr (to prevent filament burnout).
It is switched off when the pressure exceeds 3.2×10-2 Torr.
They have a CF35 CF 2.75 inch Conflat vacuum flange fitting. This is the FRG-720 gauge only,
No set points, No Profibus. User replaceable sensors, signal cables and pressure controllers sold separately on this website. Agilent Varian Part Number FRG720CF35D. A complete Operating Instruction Manual and Spec Sheet is available for download in .pdf format below under AVAILABLE DOWNLOADS.
Compatible with Agilent Varian Pressure Gauge Controllers:
- XGS-600 Multi-gauge Controller
- Active Gauge Controllers AGC-100, AGD-100
