Thermocouple Attachment – High Temperature Solder

High temperature solder is probably the most stable method of attachment

What are some advantages of Hi Temperature Solder?

Stable – long term with proper metal surfaces
Accurate – Can be attached to very small components

What are some of the disadvantages of Hi Temperature Solder.

Does not stick to many materials
May affect solder joint alloy composition
Expensive
Soldering skill required

You can buy high-temp solder here