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 thermocouples 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 is between -200°C to 1250°C.

Section (Layout)
Left Column Content
Callout Image
Subminiature Thermo-D Combination Thermocouple/Power Feedthrough
Image Callout
UHV Female Cable Assembly, 100820, PEEK Vacuum-side Connector and Kapton® insulated Leads (4)
82
350
UHV Feedthrough, 100800, Conflat® Compatible Flange
261
123
HV Feedthrough, 100791, ISO NW Compatible Flange
350
243
Air-Service Female Cable Assembly, 100840, Delrin® connector and cable (4)
251
462
Text

Thermo-D™ Thermocouple/Power 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.

Glow Discharge Graph
Right Column Content
Text

Features

  • Subminiature Thermo-D™ Interface
  • Type-K Chromel®/Alumel® pins
  • 4 TC-pairs / 2-TC pair and 2-Power leads
  • High temperature rated to 250°C
  • UHV compatible construction
  • Conflat® and ISO NW compatible mounts
  • Kapton® Insulated Vacuum Cables
  • PEEK or Macor® Connectors with Locking Screws
  • Air Service Cables / Connectors
  • Custom Solutions on Request

Specifications

Voltage 1 
TC PinsMillivolts
Power Pins500 VDC
Current 
TC PinsMilliamps
Power Pins20 A
Material 
Shell304 Stainless Steel
TC Pins (+)Chromel®
TC Pins (-)Alumel®
Power PinsAu Plated, Ni-Fe
Seal / InsulatorGlass-Ceramic
Connector, AirDelrin®
Connector, Vacuum2PEEK
Vacuum Range 
UHV, Ultrahigh Vacuum1x10-10 Torr
HV, High Vacuum1x10-8 Torr
Temperature Range 3 
Feedthrough250°C
Flange, CF450°C
Flange, ISO NW150°C
Connector, Delrin®80°C
Connector, PEEK250°C
Thermal Gradient25°C / Minute
Notes 
  1. Electrical ratings are maximum test values, with feedthrough's vacuum side at ≤ 1x10E-4 Torr. Feedthroughs are intended for instrumentation applications carrying low level signal voltage and current.
  2. PEEK is a polyether ether ketone thermoplastic.
  3. Overall assembly ratings must be adjusted to that of its lowest rated component. For cryogenic service, the lowest recommended temperature is -200°C
  4. Unless designated a 'kit,' connectors and cable assemblies are not included with feedthrough and must be purchased separately.
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