How can i recognize oil temperature inside the pipe?

Hello every body, we have a rolling stand, the oil is circulating inside the pipe and colling the stand roll, i want take a photograph from outside body of stand and make thermal spectrum from inside oil, the temperature of oil in pipe is between 20 degree centigerad to 80 degree centigerad, please help me, how can i take photograph? which camera and which resolution is require? How can i make spectrum in matlab? and is matlab good software for this purpose or no? Thanks alot.

[dpb]

I'd think you'd want to use a ready-made infrared thermometer for the purpose. It'll give you accurate wall temperatures; you'll have to do some experimental work to relate that to a bulk oil internal temperature in all likelihood but surely would be much simpler than imaging I'd think...

Unless it's the overall distribution you're after???

[mostafa]

Hi dpb, i am sorry for my delay, I dont want use infrared thermometer, i want use usual digital camera for this purpose, but i want recognize inside pipe temperature, please help me if you have any experience for it. Thaks alot for your attention.

[dpb]

How would you propose to get an IR or otherwise temperature-sensitive image from a "usual" digital camera?

My only idea of any hope would be if could paint the surface with a temperature-sensitive coating but the only ones of those I know of are irreversible in nature--once the temperature passes the indication temperature, the color changes and all you can do to get it back is repair the failure that caused the excursion and repaint the surface.

There may be some newer products, but I've no knowledge of them.