High temperature thermocouples

Industrial uses of high temperature thermocouples

Ultra high temperature thermocouples find extensive industrial applications, particularly in demanding environments such as high temperature vacuums furnaces, reducing or inert atmospheres.

These atmospheres present unique challenges.

• In vacuum atmospheres, maintaining thermocouple integrity without air pressure is crucial.
• Reducing atmospheres, rich in hydrogen or carbon monoxide, demand materials that resist carburization.
• Oxidizing environments require thermocouples that can withstand oxidation at high temperatures.
• Inert atmospheres, typically filled with noble gases, offer protection against chemical reactions but still necessitate careful selection of thermocouple materials for accurate temperature measurement.

Discover the optimal thermocouple solutions for your specific environment, enhancing performance and safety in high-temperature applications.

High temperature thermocouples are indispensable tools across various industries and sectors such as:

• Aerospace
• Semiconductor processing and equipment
• Universities and research facilities
• Pyrometallurgy
• Vacuum furnaces
• Incineration kilns
• Glass and ceramic manufacturing

There are situations where thermocouples have to withstand a combination of environments. We are happy to help with specific advice for your unique process and environment.  Get in contact.

While platinum thermocouples have their limitations, exotic thermocouples like type C and D are specifically designed to excel in temperatures and conditions that surpass platinum’s capabilities.

Avoid usage of type C and type D thermocouple wires are in the presence elevated temperatures in oxygen, nitrogen or hydrogen due to embrittlement.

Transition style thermocouples

When exotic applications require long thermocouples with expensive noble metal or refractory sheaths, ARi can supply custom made transition style thermocouples for substantial cost savings. 

Thermocouples can be supplied with suitable high temperature “hot section” sheath and insulating materials long enough to reach a cooler zone in the furnace or reactor. At this point, a brazed transition can be made to a less expensive thermocouple or compensating material with Inconel 600 or stainless-steel sheath.