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Thermocouple Feedthroughs & Components

Two CF thermocouple feedthroughs Show CF Feedthroughs for Two CF thermocouple feedthroughs
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Two thermocouple ISO feedthroughs Show ISO KF / LF Feedthroughs for Two thermocouple ISO feedthroughs
ISO KF / LF Feedthroughs
One connector to cable with 2 power pins and one connector to cable with 4 thermocouple pairs Show UHV Cables for One connector to cable with 2 power pins and one connector to cable with 4 thermocouple pairs
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2 TC/2 power and 4 TC pair UHV connectors, UHV strain relief and five TC contacts Show UHV Components for 2 TC/2 power and 4 TC pair UHV connectors, UHV strain relief and five TC contacts
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2 TC/2 power and 4 TC air cable assemblies, male/female mini connectors, TC contacts & air cables Show Air Cables / Components for 2 TC/2 power and 4 TC air cable assemblies, male/female mini connectors, TC contacts & air cables
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Thermocouple Type-K - Ultrahigh (UHV) High In-Vacuum (HV), drawing

TYPE-K Thermocouple Vacuum Feedthroughs

Thermocouple feedthroughs are mixed thermocouple-power contact combinations fitted on one feedthrough assembly constructed with pin arrangements designed to meet IEC 807-2 and DESC 85039 specifications.

Standard configurations include power pins, Chromel® / Alumel® Type-K thermocouple pin pairs, and combinations in a single subminiature-D shell.  Straight through pins are hermetically sealed and electrically insulated in a stainless steel shell using the latest in glass-ceramic bonding technology.  Ultrahigh (UHV) vacuum cable assemblies with PEEK (polyetheretherketone) connectors and Kapton® insulated wires are available to meet the demands of UHV environments. 

In-vacuum cable assemblies, individual connectors, and other accessories are available from the links below.  Available in both UHV and High Vacuum (HV) configurations. 

Custom thermocouple feedthrough flange and cable assemblies are available on request.

Thermocouple Type-K Feedthrough Specifications
Electrical 
  • Thermocouple Pins - Voltage, Maximum
  • Power-D Pins - Voltage, Maximum
  • Thermocouple Pins - Current, Per Pin Maximum @ 20ºC
  • Power-D Pins - Current, Per Pin Maximum @ 20ºC

Millivolts
500 VDC
Milliamps
20 Amps
*  For proper heat dissipation, a maximum of 20% of the pins on a feedthrough may carry the maximum pin current at any given time. 
Thermocouple Type-K Feedthrough Material Specifications
Material 
  • Shell
  • Thermocouple - Pins (+)
  • Thermocouple - Pins (-)
  • Power - Pins
  • Seal / Insulator
  • Connector, Air
  • Connector, Vacuum


304 Stainless Steel
Chromel®
Alumel®
Au plated, Ni-Fe alloy
Glass-Ceramic
Delrin®
Peek*

*  Peek is a Polyether-ether-ketone thermoplastic. 
  
Feedthrough Vacuum Range Specifications
Vacuum Range 
  • UHV, Ultrahigh vacuum
  • HV, High vacuum

1x10-10 Torr
1x10-8 Torr
Feedthrough Temperature Range Specifications
Temperature Range 
  • Feedthrough
  • Flange Mount, Conflat
  • Flange Mount, ISO
  • Connector / Cable, Air
  • Connector / Cable, Vacuum
  • Thermal Gradient


-200ºC to 250ºC
-200ºC to 450ºC
-26ºC to 150ºC
80ºC
250ºC
25ºC / Minute Maximum

* Overall assembly ratings must be adjusted to that of the lowest-rated component. 

Thermocouple feedthroughs do not measure temperature but merely provide a conduit to bring the EMF signal generated at a thermocouple junction through a vacuum vessel wall to an external voltage measuring or temperature readout instrument.  Type-K thermocouple feedthroughs with positive Chromel® wires and negative Alumel® wires are recommended for use in clean oxidizing atmospheres.  The maximum operating temperature for these alloys is 1260°C for larger wire sizes.  The useful temperature measuring range for a Type-K thermocouple feedthrough is between -200°C to 1250°C.

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