Hewlett Packard 59822B Ionization Gauge Controller

The Hewlett Packard 59822B Ionization Gauge Controller (IGC) is precision instrument engineered for ultra-high vacuum (UHV) measurement. Purpose-built to operate Bayard–Alpert ionization gauges (not included), it accurately converts tiny ion currents into dependable pressure readings, making it indispensable in laboratories, semiconductor manufacturing, surface science, cryogenics, and advanced research facilities where reliable vacuum measurement is critical. The 59822B is typically used to determine MSD vacuum at pressures from less than 2 x 10-6 Torr to 5 x 10-2 Torr, air equivalent, using a miniature triode style ionization gauge (not included) with pressure readout via a front panel display.