Identifying platinum / rhodium pyrometer hookup wire
I’ve recently come into possession of a fair quantity of old lab
furnaces, kilns, pyrometers, temp controllers, etc. Some of the
pyrometers are type R and type S and some of the wire is marked for
use only with platinum / rhodium pyrometers, most of the wire is
unmarked. I suspect that some of the hookup wire is in fact platinum
and platinum / rhodium but I’m not certain how to positively identify
it. The interesting stuff is the wire with green or gray insulation.
It does melt using oxy/propane, but with difficulty and never exactly
flows per se. It does retain a shiny surface after heating.
Any specific tests I could be doing to determine the makeup?