The kiln sitter extends from the exterior panel to the interior of the kiln. Here we see the interior parts of the kiln sitter. The round pipe is made of highly refractory material and helps protect the unexposed portions of the kiln sitter from the high temperatures. The two prongs and the lever bar are all made from highly heat resistant metal.
The prongs will support the pyrometric rod or cone used. The bar is the end of a lever whose other end is the latch on the external panel.