How to differentiate molten metal from molten salt when everything is glowing at 1050 C? Hello, I am a molten salt researcher and my reactors run at \~1050 C. I can't look inside my reactor as it operates sealed, but I am attempting to differentiate metal droplets that may be floating on the surface from the molten salt using viewing ports, or briefly opening it up and using mirrors to observe from a distance. The inside of my reactors glow orange at this temperature and as of now, even with them opened up, it is difficult to know if I am looking at anything interesting as they are bright. I hope to provide contrast and make it easier to see if anything is changing at the liquid surface. Ideas I have: 1. Two opposing viewing ports, at an angle, cut into the sealed reactor so that I can observe the surface of the liquid.…