Use a 5€ k-type probe to measure with accuracy soldering iron tip temperature

I just want to share with you a very simple trick that you can use to measure temperature of your soldering iron tip with 5€ K type thermocouple.

I got a very good accuracy and repeatability (up to the degree) for temperature measurements by using this method, despite using a simple sub 5€ type K probe.

Don’t think you can go any better than this even by using a dedicated tip thermometer.

This is how to do it:

1. split the k-type thermocouple wires so you can stick your soldering iron tip inside the two thermocouple wires;

2. tin the tip of the soldering iron;

3. stick the soldering iron tip between the two wires of the thermocouple;

4. just slightly pull the thermocouple wires so they get good thermal contact with the soldering iron tip;

5. you should now have a very stable and accurate temperature reading on your multimeter;

6. ensure the two wires doesn’t short before touching the soldering iron;

that’s all. Pretty simple and enough accurate, don’t you think?

For your safety and to prevent damaging devices you are working, check also tip-to-ground resistance and leak voltage very often. You can follow this link and this other to know how to do it.

Thanks for reading this post. If you liked it please share with your friends, comment it and let me know what you think.

CIAO – Domenico

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