TELEVAC 3F Mini BA Hot Ion Vacuum Sensor

The TELEVAC model 3D Mini BA Hot Cathode Ionization sensor maximizes performance with proven accuracy and unmatched durability in high vacuums. The miniature sensor’s rugged all-metal construction is ideal for most applications, with the primary enclosure and many of the internal elements fabricated of 304 stainless steel. The dual filaments are yttria-coated iridium and are individually supported to provide uniform output over variations in temperature and age and exhibit less calibration error. Coated iridium filaments tend to withstand pressure bursts with a robustness not possible with lesser materials. The typical user should experience a filament lifetime of 10,000 hours. The precision ion collector is 0.004” diameter, decreasing the x-ray limit of the sensor.



Measurement Range1 × 10‐2 to 1 × 10‐10 Torr
Sensitivity for Nitrogen10/Torr
Bakeout Temperature200 °C
Operating Temp0 to 40 °C
X‐Ray Limit [infoitem label="Filament Type"]Dual yttria-coated iridium
Filament Emission Current.01, 0.1, 1.0 mA or Auto
Filament Bias Potential+30 V +/‐ 0.3%
Grid Potential+180 V +/‐ 0.3%
Filament Heating Voltage1.5 V (2.5 V Max.)
Filament Heating Current2 A (3 A max.)
Mounting OrientationAny
Degas Power5 W e‐beam


Analytical Instruments
Decorative Coating
Cryogenics
Electron Microscopy
Environmental Simulation
High Energy Physics
Illumination Product Mfg.
Magnetic Media Mfg.
Molecular Beam Epitaxy
Optical & Functional Coating
Physical Vapor Deposition
Semiconductor Device Mfg.
Surface Science
Thermal Processing
Thin Film Deposition