pyrometer over 1400°C


I am Googling since several days to find way to do a project I have:

My brother in law is doing some great knives with his forge and I think he could need a pyrometer to measure the temperature of his forge.

I think that a thermocouple could work but I don’t find any solution to measure a temperature up to 2000°C (1400 would be ok but I prefer have some margin)

Any idea ?
thank you for your help

Kind regards


...aaand 1700F is nowhere near 2000C.

If it's hot enough to melt metal then it will melt the thermocouple. My first choice for this would be a non-contact infrared type but even then you will have difficulty finding one to go hot enough.

Perhaps 1500F is all that is required? A bit of googling for forging knives shows that this is the range used for hardening steel knife blades.

Google Omega products. They have everything you would ever need and a lot of helpful information on the use of thermocouples. Look for a thermocouple well. The are used to protect thermocouples in harsh environments.


Thank you for your answers.

I came to the same conclusion but: -Contactless is very hard to find with this high level of temperature - I already checked the omega product but I am wondering on how to connect those devices to my arduino: there are some interface components existing but I didn't found any to operate with this range of temperature.

If you have any other idea/guidance it would be great :)

Surely the only way to do this is optically. One way is to have a tungsten filament bulb with the background as your heat source, and adjust the current through the bulb until the filament disappears - this is the basis of some professional devices.

But you'd need to calibrate it, of course!

google optical pyrometers