There are dials, switches and in spite of my willingness to noodle
around with it for a few days I am unable to figure it out without
some guidance. If anyone has some insight as to how this thing
works or where to look for an answer to this quest I would be most
The Rey Programmed Therminder is a furnace controller sold by Swest
in the 1980s. It was specifically designed for the jewelry industry.
The programmed part is for burning out the wax. There were three
versions made, the Mark II is the most common. The infinite switch on
the kiln is set to “High” (should be a detent position) so it is on
all the time and controlled by the Therminder.
The only instruction manual is a one page brochure and instruction
sheet. If you send me a self-addressed-stamped envelope, I will send
you a copy of the instructions. We are the only factory service center
for the Therminders. Although it is old, repair service is still
The Jewelry Equipment Dr.