Pyrometry

Well, there are certain chemical processes where phase change happens within just a few degrees at temperatures around 500^oC. At temperatures that high, even platinum sensors and associated electronics leaves some ambiguity in the measured temperature.

Likewise, temperatures above 1500^oC are difficult to measure precisely by any means of which I am aware.

Do you have a method to improve on state of the art?

Thanks Bill,

Not sure about the method yet, was just looking for some particular applications where it would be useful to have accurate temperature measurements with changing emissivity.Do you have much knowledge of these chemical processes and how widely they are used in the industry?

Thanks,

Shonan

I know very little about chemical processes in industry. I work at a university in research support and have run across several instances where high temperatures needed to be measured or controlled very accurately. The accuracy of ordinary means of temperature measurement leaves a little to be desired when measuring temperatures above 500^oC.

If I may, don't concern yourself about processes until you have developed a method to very accurately measure temperatures above 400 - 500 degrees Celcius. If you build it, they will come . . .

Do a little research on calorimetry, high temperature measurement, and precision of temperature measurement. For example, platinum RTD's have a fairly good and well-known temperature - resistance curve, but they are only good to about 600^oC.

If you don't have one, get an Omega Temperature Handbook. There's a fairly good technical section which describes a variety of temperature measurement methods.

Try pyrometry.com, they claim an accuracy of 0.1% of reading, from 500 to >3500°C and emissivity independence.

But you mention RTD's, these are not pyrometric sensors. Did you try fiber optic (many technologies possible) sensors, Tungsten RTD's?

Here's the link: Pyrometry

Actually, the technology that we have in mind has a very high accuracy at higher temperatures It has more advantages than those mentioned by Far technologies given on pyrometry.com (that you mentioned). We are just currently looking for industrial applications where our technology may be used

Ther are some high temp processes in the manufacure of integrated circuits.

Thanks Rummel,

Can you explain these applications in more detail(website links etc) and are these processes very temperature sensitive?

Thanks,

Shonan

Thanks for your help :)

A good air conditioner can maintain +/- 1 deg F. is that what you mean?

Through what range of temps?