Cold cathode vacuum sensor
Agilent Technologies - Life Sciences and Chemical
The Agilent 525 Cold-Cathode Gauge Tube measures pressures from 1 × 10-8 to 1 × 10-2 torr and has excellent repeatability, accuracy, and reliability. Similar in configuration to the magnetron tube, the 525 gauge starts at very low pressures in which ordinary Penning gauges are difficult to start.
