Hot Cathode BA Gauge Controller
Product Details:
The Vacuum Techniques microprocessor based BA (Bayard Alpert) ionization gauge controller consists of various circuits for the gauge head to function like electrometer amplifier, CPU and indication system with various protection and feed back, relay set points, recorder output and RS 232 for PC interfacing. The control unit matches with any manufacturer gauge head. Normally the control unit is supplied with imported gauge head.
PRINCIPLE Electron emitted from the hot filament of a triode system are accelerated to about 150V and on their journey to +Ve grid ionize a certain number of gas molecules by bombardment. The number of +Ve ions thus formed depends on pressure, nature of gas molecules ,electron current and the geometry of the gauge head. With proper choice , it is possible to calibrate ion current with pressure. Using main CPU, various combination of gauge can be made to extend and suit application requirement . Pirani gauge can be added to cover the range from atmosphere to 1x10-10 mbar. Gauge control can be made suitable to any standard ionization gauge sensors.