Thermocouple
Base + noble
metal thermocouple wire
No filler
no solder or crimping
Light pressure
no damage to wire hardness or resistance
Automatable
consistent welds, low and high volume

Chapter 01 / 04
The Ideal Option For Thermocouple Welding
Thermocouples play a crucial role in temperature measurement, utilizing the current generated by heating one end of two dissimilar metals. These sensors are known for their high accuracy and can be designed using a wide range of metals and corresponding calibrations. While general-use thermocouples employ base metals for the two dissimilar wires, noble metal thermocouples are preferred for high-temperature applications. Achieving precise welds between these wires and the thermocouple components is vital for ensuring measurement accuracy and device performance.


Chapter 02 / 04
Simplifying Thermocouple Welding
Percussion Welder has developed specialized technology that makes thermocouple welding easier than ever before. Instead of guessing if there is a good point of contact between your material and thermocouple, our technology ensures you have a secure connection without any guesswork. It eliminates having to adjust the power output or apply additional finishing touches as you go, allowing you to quickly create stable connections so you can move on to the next project. This innovative system leads to greater efficiency and accuracy in thermocouple welding, ultimately resulting in better products and increased customer satisfaction.






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Gallery
Thermocouple wire at the fixture
Bench setup, wire welds and the weld process.
Chapter 03 / 04
Thermocouple Welding Options
Enhanced Weld Strength and Performance
Percussion Welder offers a precise, accurate, and controlled option for welding thermocouples. Unlike other thermocouple spot welders, our system offers increased weld strength and performance with a bonded weld that is strong and durable. Our thermocouple wire welder uses both heat sources and pressure to fuse the molten ends of the two delicate wires for a butt weld that does not require filler, solder, or crimping.
Controlled Heat and Pressure
Percussion Welder is the ideal option for thermocouple welding due to its precise control of both heat and pressure. This technology uses an electrical arc to generate a spark, which melts both ends of the wire simultaneously. The pressure applied is light and consistent, ensuring that there is no damage to either wire’s hardness or resistance. By controlling the gap and the timing of the electrical arc and percussion, the welds are consistent, ensuring quality welding on both low and high-volume levels.
Integration with Automation
Efficient Thermocouple Welding Techniques
The Percussion Welder can also be integrated with automation, providing efficient thermocouple welding techniques for any manufacturing and industrial processes. This integration allows manufacturers to achieve consistent welds with minimal effort and cost, making it an ideal solution for high-volume production.
Robust and Long-Lasting Welds
Picking Percussion Welder for your thermocouple welding offers unmatched control, accuracy, and precision. With its ability to be integrated into automated processes, manufacturers can achieve robust, trustworthy, and long-lasting welds. These welds are perfect for high-temperature applications, setting a new standard for thermocouple welding solutions.


Chapter 04 / 04
Why Choose Percussion Welder for Thermocouple Welding?
Unmatched Precision and Control
Our technology provides unparalleled precision and control, surpassing all other welding methods. This ensures that each weld is of the highest quality, enhancing the performance and reliability of your thermocouples.
Cost-Effective and Efficient
With the ability to integrate into automated processes, our system ensures consistent, top-quality welds with minimal effort and cost. This efficiency makes it a popular choice among manufacturers looking to optimize their production processes.

Unmatched Precision and Control
Percussion Welder provides unparalleled precision and control in thermocouple welding. This ensures that each weld is of the highest quality, enhancing the performance and reliability of your thermocouples. The precise control over heat and pressure ensures consistent and accurate results.
Efficient and Cost-Effective
Our welding technology is designed to be integrated into automated processes, allowing for consistent, top-quality welds with minimal effort and cost. This efficiency makes it an ideal solution for high-volume production, reducing labor costs and increasing throughput.
Robust and Long-Lasting Welds
The welds produced by Percussion Welder are robust and durable, making them perfect for high-temperature applications. The bonded welds are strong and resistant to wear and tear, ensuring longevity and reliability in demanding environments.
Versatility in Material Welding
Percussion Welder can handle a wide range of materials, including base metals and noble metals used in thermocouples. This versatility ensures that our system can meet the specific needs of various industries, from electronics to industrial temperature control.
See The Difference For Yourself. Get Hands-On Experience And Put Percussion Welding Equipment To The Test.
Let’s find a time for you to come in and actually get your hands dirty. Bring in your most challenging current project or we have a wide range of metals we can experiment with. Let us show you what Percussion Welder can do.


No matter what your micro-welding challenge is, the Percussion Welder team at MTI Microwelding is available to offer guidance, answer questions, and even run live, in-person tests using our equipment.

Topic guide
Thermocouple Welding: articles
Where to next
Thermocouple Welding Essentials: Everything You Need to Know
How to weld thermocouple junctions: Type K (Chromel-Alumel), Type J, and Type T. Percussion welding creates consistent bead junctions in under 3ms with near-zero HAZ. Weld parameters included.
Open →Precision Welding for High-Temperature Thermocouple Sensors
In automotive engineering, precise temperature measurement in extreme conditions—such as turbochargers and exhaust systems exceeding 900°C—drives innovation. This guide explores the fabrication of Type N thermocouples
Open →Welding Thermocouple Wire
Step-by-step guide to welding thermocouple wire by percussion welding. Covers bead junction formation, wire preparation, fixture setup, and verified parameters for common thermocouple types.
Open →Weld schedules
Open →FAQ
Why does the weld matter for a thermocouple?
A thermocouple measures temperature using the current generated by heating one end of two dissimilar metals. Precise welds between the wires and components are vital for measurement accuracy and device performance.
Which thermocouple wires can be welded?
Both base metals, used in general-purpose thermocouples, and noble metals, preferred at high temperature.
How is the weld made?
An electrical arc melts both wire ends at once and light pressure brings them together into a butt weld that needs no filler, solder or crimping.
Does the pressure damage the wire?
No. The pressure is light and consistent, so there is no damage to either wire's hardness or resistance.
Can it be automated?
Yes. Integration with automation is described for consistent welds at low and high volume.
Where can I find settings for my wire?
Our lab weld-schedule database includes Chromel and Alumel thermocouple alloys, as starting points rather than guarantees. Contact us to confirm for your wire size.
Still have a question? Tell us your weld challenge and an engineer will reply.
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Send the alloy pair and wire gauge, or bring samples for a live test in Denver.
Prefer to talk? Book a demo or call 303-536-7838

