Thermocouple (Type-K) - Ultrahigh (UHV) High In-Vacuum (HV)

Thermocouple (Type-K) Subminiature-D Feedthroughs

Thermocouple (Type-K) - Ultrahigh (UHV) High In-Vacuum (HV)

Thermocouple (Type-K) Power-D hermetic subminiature-D 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-power 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.

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