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Vacuum is the great enabling technology of the 21st century.  Lots of us use vacuum as a means to an end - for others the presence of a few molecules (still a big number!) is critical.

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Product Spotlight

Vacuum Feedthroughs are hermetic, vacuum sealed components and assemblies that have a conductor (wire, pins or solid rod) mounted into a ceramic to metal, glass to ceramic insulator joint to electrically isolate the current carrying conductors from the metallic mounting.   They are suitable for high vacuum (HV) and ultra-high vacuum (UHV) environments and temperatures ranging from -270°C to 450°C.

Vacuum Feedthroughs

Power Feedthroughs
Vacuum Power Feedthroughs provide transportation of electrical current into/from a High-Vacuum (HV) or Ultra-High Vacuum (UHV) vacuum vessel.

Vacuum Power Feedthroughs are available in a vast variety of types of mounting flanges, voltages, and current carrying capacities.   Electrical Power Feedthroughs are available in the Voltage & Current range 1kV 3A to 8kV 500A.

Multi-pin Vacuum Feedthroughs
Multi-pin Vacuum Feedthroughs are feedthroughs with two or more conducting pins and are designed to accept a plug on the air side, but some feedthroughs allow for plugs on the vacuum side also.   Multi-pin Vacuum Feedthroughs are available in a vast variety of types of mounting flanges and pin design.

Hermetically sealed Multi-pin Vacuum Feedthroughs are designed primarily to provide instrumentation signals, voltage and/or current into/from a High-Vacuum (HV) or Ultra-High Vacuum (UHV) vacuum vessel.

  • Voltages up to 12kV DC
  • Currents up to 40A
  • Temperature range from -269°C to 450°C
  • Internal pressure 1x10-10 mbar up to 41 bar (600 psig)
  • Up to 50 pins/conductors

Co-axial Vacuum Feedthroughs
Co-axial Vacuum Feedthroughs are connectors that consist of two concentric conductors, a central inner conductor serves as a current carrying contact and is surrounded by and insulated from an outer tubular conductor that serves as an electromagnetic shield.   The outside conductor is usually at ground potential but in some product variations may be floated off ground by employing an additional insulating ring.   The outer conducting surface can prevent radio frequency noise from passing to or from the central conductor.

Co-axial Vacuum Feedthroughs are available in Industry Standard types BNC, MHV, various SHVs, N, Microdot, SMA, and SMB.   Industry Standard Specifications:

  • Grounded shield or floating shield configuration
  • High frequency 50Ω impedance matched connectors as SMA, BNC, Type N and HNC
  • Connectors are sold with or without air side plugs

Thermocouple Vacuum Feedthroughs
Thermocouple Vacuum Feedthroughs are used to measure temperature inside a vacuum vessel.   Thermocouple Vacuum Feedthroughs are manufactured with differing thermocouple materials or compensating material.   The differing materials transmit electromotive force (EMF) generated by the heat application to the thermocouple hot junction (bead joint) transmitted from the inside of a vacuum vessel.   External temperature measurement controllers evaluate the strength of the electromotive force that is proportional to the temperature at the hot junction and displays the temperature.   Typical ANSI-standardized thermocouple material pairs are listed in the table below.

Thermocouple Materials Polarity Maximum
Range (°C)
Plug & Jack Colour
T Copper
-200 to 350 Blue
K Cromel
-200 to 1250 Yellow
R Platinum Rhodium-13%

0 to 1450 Green
S Platinum Rhodium-10%

0 to 1450 Green
J Iron
0 to 750 Black
E Cromel
-200 to 900 Purple
C Tungsten Rhenium-5%
Tungsten Rhenium-26%

0 to 2315 Red

Instrument Vacuum Feedthroughs
Instrument Vacuum Feedthroughs are designed to transfer low current, low or high voltage signals from low or high impedance into/from a vacuum vessel.   They have one or multiple conductors (wire) with a standard electrical plug/socket on the air-side.   Some types are also suitable to have connections on the vacuum side.