Thread: Borescope Camera - DIY Hi-Temp Version

And the obvious question .... can the kiln be turned off and hence cooled down for this maintenance?

Originally Posted by W&KO

Problem is I need one to handle 850 degrees for maybe 10sec max.

At the temperatures your talking about I'm sure you would get away with an optical fibre down a copper tube with water cooling provided you got the water cooling flow rate right.

Though copper has fairly low melting point it has very high thermal conductivity. Just got to transfer the heat away from it fast enough and it will stay intact. Will last much longer than 10sec too.

Blast furnace tuyeres (the ports through which hot blast is admitted into a blast furnace) are essentially water cooled copper pipes. The blast is ~1200C and the tuyeres protrude into 2000C environments. They last ~3 months provided they only have to cope with radiation. Splash them with molten metal and it's a different story.