Model S27 Fast Ionization Gauge

Applied Pulsed Power’s hot cathode fast ionization gauge (FIG) measures time varying gas density in a localized region. The FIG can be used to measure pressures from 1mTorr to several Torr, and has a response time of >20 mTorr/μs. The FIG has been used extensively with hydrogen and nitrogen and should perform well with other gases with the exception of oxygen.

The FIG is designed to minimize the disturbance to the gas flow in one direction. Interelectrode spacings are kept small to allow high density measurements to be made in a localized region. Our standard gauge samples a volume approximately 3×4x4 mm. Gauges with other geometries can be fabricated to accommodate your requirements.

The FIG response is linear when operated at the appropriate emission current for the gas type and pressure range being measured. The gauge is normally calibrated for H2, and is supplied with installation and operating instructions which include information on appropriate emission currents for different gas species and pressures.

Download the Model S27 Data Sheet.