The Alpha Technology Type K Thermocouple Vacuum Feedthrough carries accurate temperature measurement from inside a vacuum chamber to your controller, using a true ceramic-to-metal hermetic seal rather than epoxy. Type K (NiCr-NiSi) is the workhorse of vacuum processing — from semiconductor equipment and thin-film deposition to furnaces and cryogenic test rigs.
Type K Thermocouple Vacuum Feedthrough — Key Specifications
| Thermocouple Type | Type K (NiCr-NiSi) |
|---|---|
| Temperature Range | -200 °C to 1200 °C |
| Vacuum Leak Rate | UHV < 1×10⁻¹⁰ mbar·l/s |
| Flange | CF / KF |
| Number of Pairs | 1 / 2 / 3 / 4 |
| Body Material | Ceramic / Stainless Steel / Kovar |
Why It Meets UHV Requirements
- Hermetic ceramic-to-metal seal — no epoxy joints that outgas or fail under bakeout
- 1 to 4 thermocouple pairs in a single flange, saving port space
- Compensation at the vacuum flange with extension wire options
- Leak tested to < 1×10⁻¹⁰ mbar·l/s and bakeable to 450 °C
- Also available in Type C (W-Re), Type S and Type R thermocouple grades
Typical Applications
- Semiconductor process chambers (CVD, PVD, etch)
- Thin-film deposition and coating systems
- Vacuum furnaces and heat-treatment equipment
- Cryogenic and thermal-cycling test facilities
Custom & OEM Options
Every Alpha Technology feedthrough is manufactured to order. Voltage, current, pin layout, conductor material, flange and mounting geometry can all be customized. Contact us with your drawing or specification and our engineers will provide a free design review.
FAQ
What is the difference between Type K and Type C thermocouple feedthroughs?
Type K (NiCr-NiSi) covers -200 to 1200 °C and is the most common industrial choice. Type C (tungsten-rhenium) is for ultra-high temperature applications up to 2320 °C. We supply both — specify your process temperature range when requesting a quote.
Can you combine thermocouple pins with power or signal pins?
Yes, mixed pin configurations are available on custom feedthroughs. Our engineers will review your pin-out diagram and provide a custom layout.
What is the price?
Thermocouple feedthrough pricing depends on pair count, flange type and body material. Please request a quotation with your requirements for a custom price.
Related Products
See our full range of vacuum feedthroughs, explore edge welded bellows for motion transmission into vacuum, or read the bellows design & selection guide.
Ready to specify your feedthrough? Request a quote — our engineers respond within one business day.
