Since 1958 Thermionics has designed, developed, and manufactured ultra high vacuum (UHV) equipment for scientific and industrial applications. Our products are the result of careful research and development, rigorous testing, and continuing performance evaluation. For new components and systems, or the modification and repair of existing equipment, Thermionics will deliver the best equipment and value to you.

Our product lines include:

• High Vacuum Pumps
• Manipulators and Mechanical Feedthroughs
• e-Guns
• Vacuum Coating Systems
• Valves
• Flanges and Fittings
• PyraFlat and TriMetal Flanges
• Mechanical Feedthroughs
• Electrical Feedthroughs
• Vacuum Pressure Gauges
• Helium Leak Detectors