Brian did not add much detail. He did not mention the guy's name. Maybe we can persuade Jones Beene to enlighten us on that, perhaps by playing him like a harp.
Brian said that he asked the guy whether it was correct to use a pyrometer centered on 7-13 microns. The guy said that is exactly the right range. Brian added that the expert: ". . . performs such measurements every day for over 35 years. He actually uses the same pyrometer for measuring things like rocket plumes with temperatures up to 2000C. He believes the data is accurate and was conducted in a manner consistent with his experience. The measurements rely on accurate emissivity data and he says they were indeed accurate." As I mentioned, a lot of this depends upon the material and surface roughness but this expert is familiar with high temperature alumina vessels and he thinks this was the right choice for them. - Jed
